Use `.yaml` for GitHub workflow configs

Fixes https://github.com/bazelbuild/rules_cc/actions/runs/16293422423

PiperOrigin-RevId: 783297272
Change-Id: I864a9846d2a1b7b13169d8a53cb40ee5aa9fdc6f
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yaml
similarity index 100%
rename from .github/workflows/publish.yml
rename to .github/workflows/publish.yaml
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yaml
similarity index 100%
rename from .github/workflows/release.yml
rename to .github/workflows/release.yaml