Updates README.md (#2387)

* Updates release schedule for 2023

* Fixes broken build badge

* Another build badge tweak

* Even more badge tweaking

* More branch tweaking

* More badge tweaking

* More badge tweaks

* Even more badge tweaking

* Adds badges for other branches

3 files changed, 26 insertions, 25 deletions

diff --git a/README.md b/README.md
index 40947ab..38e48ed 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,11 @@ HDF5 version 1.15.0 currently under development
 
 ![HDF5 Logo](doxygen/img/HDF5.png)
 
-[![Build](https://img.shields.io/github/workflow/status/HDFGroup/hdf5/hdf5%20dev%20CI/develop)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Adevelop)
+[![develop build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=develop&label=develop)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Adevelop)
+[![1.14 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_14&label=1.14)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_14)
+[![1.12 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_12&label=1.12)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_12)
+[![1.10 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_10&label=1.10)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_10)
+[![1.8 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_8&label=1.8)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_8)
 [![BSD](https://img.shields.io/badge/License-BSD-blue.svg)](https://github.com/HDFGroup/hdf5/blob/develop/COPYING)
 
 *Please refer to the release_docs/INSTALL file for installation instructions.*
@@ -79,12 +83,18 @@ RELEASE SCHEDULE
 HDF5 does not release on a regular schedule. Instead, releases are driven by
 new features and bug fixes, though we try to have at least one release of each
 maintenance branch per year. Future HDF5 releases indicated on this schedule
-are tentative. 
+are tentative.
+
+**NOTE**: HDF5 1.12 is being retired early due to its incomplete and incompatible VOL
+layer.
 
 | Release | New Features |
 | ------- | ------------ |
-| 1.13.2 | Onion VFD, Selection I/O, Subfiling |
-| 1.13.3 | Multi-Dataset I/O |
+| 1.8.23 | last HDF5 1.8 release |
+| 1.10.10 | CVE fixes, performance improvements, H5Dchunk\_iter() |
+| 1.12.3 | CVE fixes, performance improvements, H5Dchunk\_iter(), last HDF5 1.12 release |
+| 1.14.1 | selection I/O with datatype conversion |
+| 2.0.0 | TBD |
 | TBD | VFD SWMR |
 
 This list of feature release versions is also tentative, and the specific release
diff --git a/doc/img/release-schedule.plantuml b/doc/img/release-schedule.plantuml
index f51f9d4..c724dc9 100644
--- a/doc/img/release-schedule.plantuml
+++ b/doc/img/release-schedule.plantuml
@@ -2,7 +2,8 @@ The release timeline was generated on PlantUML (https://plantuml.com)
 
 The current script:
 
-@startuml
+@startgantt
+
 title HDF5 Release Schedule
 
 projectscale monthly
@@ -10,34 +11,24 @@ Project starts 2022-01-01
 
 [1.8] starts 2022-01-01 and lasts 57 weeks
 [1.8.23] happens 2023-01-31
-[1.8] is colored in #CC6677
+[1.8] is colored in #F76969
 
 [1.10] starts 2022-01-01 and lasts 104 weeks
 [1.10.9] happens 2022-05-31
-[1.10.10] happens 2023-03-31
+[1.10.10] happens 2023-02-28
 [1.10.10] displays on same row as [1.10.9]
-[1.10] is colored in #DDCC77
+[1.10] is colored in #F6DD60
 
-[1.12] starts 2022-01-01 and lasts 61 weeks
+[1.12] starts 2022-01-01 and lasts 65 weeks
 [1.12.2] happens 2022-04-30
-[1.12.3] happens 2023-02-28
+[1.12.3] happens 2023-03-31
 [1.12.3] displays on same row as [1.12.2]
 [1.12] is colored in #88CCEE
 
-[1.13] starts 2022-01-01 and lasts 53 weeks
-[1.13.1] happens 2022-03-02
-[1.13.2] happens 2022-08-15
-[1.13.3] happens 2022-10-31
-[1.13.2] displays on same row as [1.13.1]
-[1.13.3] displays on same row as [1.13.1]
-[1.13] is colored in #44AA99
-
 [1.14] starts at 2023-01-01 and lasts 52 weeks
-[1.14.0] happens at 2023-01-01
-[1.14.1] happens at 2023-06-30
-[1.14] displays on same row as [1.13]
-[1.14.0] displays on same row as [1.13.1]
-[1.14.1] displays on same row as [1.13.1]
-[1.14] is colored in #AA4499
-@enduml
+[1.14.0] happens at 2022-12-31
+[1.14.1] happens at 2023-04-30
+[1.14.1] displays on same row as [1.14.0]
+[1.14] is colored in #B187CF
 
+@endgantt
diff --git a/doc/img/release-schedule.png b/doc/img/release-schedule.png
index 42f0658..b96f741 100644
--- a/doc/img/release-schedule.png
+++ b/doc/img/release-schedule.png