Add release notes for Scala 3.3.7-RC2

Author: tgodzik

changelogs/3.3.7-RC2.md

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+# Backported fixes
+
+- Backport: Make coverage more similar to the one in Scala 2 [#23955](https://github.com/scala/scala3/pull/23955)
+- Backport: latest Scala Presentation Improvements to 3.3.7 [#23945](https://github.com/scala/scala3/pull/23945). This includes [X-Ray Inlay Hints](https://github.com/scala/scala3/pull/23891), [using completions](https://github.com/scala/scala3/pull/23647), [do not add \[\] after `derives`](https://github.com/scala/scala3/pull/23811).
+- Revert: "Check exhaustivity of any case class" to 3.3 LTS [#23943](https://github.com/scala/scala3/pull/23943)
+
+# Contributors
+
+Thank you to all the contributors who made this release possible 🎉
+
+According to `git shortlog -sn --no-merges 3.3.7-RC1..3.3.7-RC2` these are:
+
+```
+     2  Tomasz Godzik
+     1  Jan Chyb
+     1  Vadim Chelyshov
+     1  Zieliński Patryk
+     1  vder
+```