Update release schedule

* Add 2024, remove 2022
* Update README.md

doc/img/release-schedule.plantuml

@@ -7,36 +7,33 @@ The current script:
 title HDF5 Release Schedule
 
 projectscale monthly
-Project starts 2022-01-01
+Project starts 2023-01-01
 
-[1.8] starts 2022-01-01 and lasts 57 weeks
+[1.8] starts 2023-01-01 and lasts 5 weeks
 [1.8.23] happens 2023-01-31
 [1.8] is colored in #F76969
 
-[1.10] starts 2022-01-01 and lasts 91 weeks
-[1.10.9] happens 2022-05-31
+[1.10] starts 2023-01-01 and lasts 39 weeks
 [1.10.10] happens 2023-03-31
 [1.10.11] happens 2023-09-30
-[1.10.10] displays on same row as [1.10.9]
-[1.10.11] displays on same row as [1.10.9]
+[1.10.11] displays on same row as [1.10.10]
 [1.10] is colored in #F6DD60
 
-[1.12] starts 2022-01-01 and lasts 100 weeks
-[1.12.2] happens 2022-04-30
+[1.12] starts 2023-01-01 and lasts 48 weeks
 [1.12.3] happens 2023-11-30
-[1.12.3] displays on same row as [1.12.2]
 [1.12] is colored in #88CCEE
 
-[1.14] starts at 2023-01-01 and lasts 78 weeks
-[1.14.0] happens at 2022-12-31
+[1.14] starts at 2023-01-01 and lasts 104 weeks
 [1.14.1] happens at 2023-04-30
 [1.14.2] happens at 2023-08-31
 [1.14.3] happens at 2023-10-31
 [1.14.4] happens at 2024-03-31
-[1.14.1] displays on same row as [1.14.0]
-[1.14.2] displays on same row as [1.14.0]
-[1.14.3] displays on same row as [1.14.0]
-[1.14.4] displays on same row as [1.14.0]
+[1.14.5] happens at 2024-09-30
+[1.14.1] displays on same row as [1.14.1]
+[1.14.2] displays on same row as [1.14.1]
+[1.14.3] displays on same row as [1.14.1]
+[1.14.4] displays on same row as [1.14.1]
+[1.14.5] displays on same row as [1.14.1]
 [1.14] is colored in #B187CF
 
 @endgantt