[ci] Bump the version of clang-format used in the CI (#119915)

The version of clang-format we use in the CI to format all PRs is a bit
outdated, leading to some confusion when the CI job produces different
output from what people have locally.

Author: ldionne

.github/workflows/pr-code-format.yml

@@ -60,7 +60,7 @@ jobs:
       - name: Install clang-format
         uses: aminya/setup-cpp@v1
         with:
-          clangformat: 18.1.7
+          clangformat: 19.1.6
 
       - name: Setup Python env
         uses: actions/setup-python@v5