Prepare 2.5.0rc2 (pantsbuild#12065)

[ci skip-rust]

src/python/pants/notes/2.5.x.md

@@ -2,6 +2,18 @@
 
 See https://www.pantsbuild.org/v2.5/docs/release-notes-2-5 for an overview of the changes in this release series.
 
+## 2.5.0rc2 (May 12, 2021)
+
+### Bug fixes
+
+* Fix module_mapping to work regardless of capitalization and `-` vs `_` (Cherry-pick of #12068)  ([#12070](https://github.com/pantsbuild/pants/pull/12070))
+
+* Fix PEX_ROOT leak for run and repl goals. (Cherry-pick of #12066) ([#12067](https://github.com/pantsbuild/pants/pull/12067))
+
+* Fix Python run for apps that re-exec themselves (Cherry-pick of #12060) ([#12063](https://github.com/pantsbuild/pants/pull/12063))
+
+* Fix Shell dependency inference not caching (Cherry-pick of #12052) ([#12056](https://github.com/pantsbuild/pants/pull/12056))
+
 ## 2.5.0rc1 (May 10, 2021)
 
 ### New Features