use short commit sha

Author: kinkie

.github/workflows/gen-docs.yaml

@@ -45,7 +45,7 @@ jobs:
         run: |
           LAST_COMMIT_HASH=$(cat last-squid-commit.txt || echo "")
           cd squid
-          CURRENT_COMMIT_HASH=$(git rev-parse HEAD)
+          CURRENT_COMMIT_HASH=$(git rev-parse --short HEAD)
           echo "current=$CURRENT_COMMIT_HASH" >> $GITHUB_OUTPUT
           if [ "$LAST_COMMIT_HASH" = "$CURRENT_COMMIT_HASH" -a "$FORCE_REBUILD" != "true" ]; then
             echo "marking as no no updates"
@@ -75,7 +75,7 @@ jobs:
       - name: Build programming guide
         if: steps.check_squid_updates.outputs.had_update == 'true'
         run: |
-          sed -i~ 's/PROJECT_NUMBER           = .*/& (commit ${{ steps.check_squid_updates.outputs.current }})/' doxyfile
+          sed -i~ 's/PROJECT_NUMBER           = .*/&-${{ steps.check_squid_updates.outputs.current}}/' doxyfile
           doxygen doxyfile
 
       - name: update self