Bump external/Catch2 from `8ac8190` to `bfe3ff8` (#3366)

Bumps [external/Catch2](https://github.com/catchorg/Catch2) from `8ac8190` to `bfe3ff8`.
- [Release notes](https://github.com/catchorg/Catch2/releases)
- [Commits](8ac8190e49...bfe3ff8f19)

---
updated-dependencies:
- dependency-name: external/Catch2
  dependency-type: direct:production
...

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external/Catch2

@@ -1 +1 @@
-Subproject commit 8ac8190e494a381072c89f5e161b92a08d98b37b
+Subproject commit bfe3ff8f19d3436381b4e3a18c13734d21a8b089