ci,vc: use the full V repo commit hash, when generating vlang/vc commit messages

Author: spytheman

.github/workflows/gen_vc_ci.yml

@@ -39,7 +39,7 @@ jobs:
           git config --global user.email "vlang-bot@users.noreply.github.com"
           git config --global user.name "vlang-bot"
 
-          COMMIT_HASH=$(git rev-parse --short HEAD)
+          COMMIT_HASH=$(git rev-parse HEAD)
           COMMIT_MSG=$(git log -1 --oneline --pretty='%s' HEAD)
 
           rm -rf vc