Bump dev.cel:cel from 0.9.1 to 0.9.1-proto3

Bumps [dev.cel:cel](https://github.com/google/cel-java) from 0.9.1 to 0.9.1-proto3.
- [Release notes](https://github.com/google/cel-java/releases)
- [Commits](https://github.com/google/cel-java/commits)

---
updated-dependencies:
- dependency-name: dev.cel:cel
  dependency-version: 0.9.1-proto3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 assertj = "3.27.3"
 buf = "1.54.0"
-cel = "0.9.1"
+cel = "0.9.1-proto3"
 error-prone = "2.38.0"
 junit = "5.13.0"
 maven-publish = "0.32.0"