Add changelog for 3.5.0-RC2

Author: WojciechMazur

changelogs/3.5.0-RC2.md

@@ -0,0 +1,25 @@
+# Backported fixes
+
+- Bundle scala-cli in scala command [#20351](https://github.com/scala/scala3/pull/20351)
+- Avoid stacked thisCall contexts [#20488](https://github.com/scala/scala3/pull/20488)
+- Adapt the workflow to release on SDKMAN! [#20535](https://github.com/scala/scala3/pull/20535)
+- Adapt the release workflow to SIP-46 [#20565](https://github.com/scala/scala3/pull/20565)
+- Disable ClasspathTests.unglobClasspathVerifyTest [#20551](https://github.com/scala/scala3/pull/20551)
+- Set default source version to 3.5 [#20441](https://github.com/scala/scala3/pull/20441)
+- Bring back ambiguity filter when we report an implicit not found error [#20368](https://github.com/scala/scala3/pull/20368)
+- Treat 3.5-migration the same as 3.5 for a warning about implicit priority change [#20436](https://github.com/scala/scala3/pull/20436)
+- Avoid forcing whole package when using -experimental [#20409](https://github.com/scala/scala3/pull/20409)
+
+# Contributors
+
+Thank you to all the contributors who made this release possible 🎉
+
+According to `git shortlog -sn --no-merges 3.5.0-RC1..3.5.0-RC2` these are:
+
+```
+     4  Hamza Remmal
+     4  Wojciech Mazur
+     3  Martin Odersky
+     1  Jamie Thompson
+     1  Guillaume Martres
+```