docs: Update docs for v4.10 release (#6937)

maintained-branches.md

@@ -2,8 +2,8 @@
 
 We are currently maintaining the following branches of Shaka Player:
 
- - v4.9 (latest, in use by the Cast Application Framework)
- - v4.8 (previous)
+ - v4.10 (latest)
+ - v4.9 (previous, in use by the Cast Application Framework)
  - No active LTS branches at this time
 
 Other branches are no longer receiving bug fixes, and we recommend you upgrade

roadmap.md

@@ -20,14 +20,17 @@ Candidate features for future release cycles:
 v5.0 - 2024 Q4
  - Conversion to Typescript
 
+v4.11 - 2024 Q3
+ - HLS improvements
+
+=====
+
 v4.10 - 2024 Q3
  - HLS support for EXT-X-DATERANGE
    https://github.com/shaka-project/shaka-player/issues/3523
  - HLS interstitials
    https://github.com/shaka-project/shaka-player/issues/3364
 
-=====
-
 v4.9 - 2024 Q2
  - DASH patch manifests
    https://github.com/shaka-project/shaka-player/issues/2228