Update autotag.yml

Signed-off-by: Suguru Hirahara <[email protected]>

Author: Suguru Hirahara

.github/workflows/autotag.yml

@@ -37,9 +37,8 @@ jobs:
         id: find_renovate_commit
         run: |
           git log -n 20 --pretty=format:'%H|%an|%s' | while IFS='|' read -r commit author subject; do
-            if [[ "$author" == "renovate[bot]" && "$subject" == *"Docker tag to "* ]]; then
-              VERSION_PART="${subject#*Docker tag to }"
-              VERSION="$(echo "$VERSION_PART" | xargs)"
+            if [[ "$author" == "renovate[bot]" && "${subject,,}" == *"docker tag to "* ]]; then
+              VERSION=$(echo "$subject" | sed -E 's/.*[Dd]ocker tag to (.+)$/\1/')
               echo "new_version=$VERSION" >> $GITHUB_OUTPUT
               echo "commit_hash=$commit" >> $GITHUB_OUTPUT
               echo "Found Renovate commit: $commit with version: $VERSION"