bug: escape quote in commit_message to prevent bash failure

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
         with:
           token: ${{ secrets.SCRIBD_SLACK_GENERIC_TOKEN_PUBLIC }}
           channel: test-release-notification
-          message: <https://scribd.com|Special characters + "quotes" + `backtick`>
+          message: <https://scribd.com|Special characters + 'single quote' + "double quotes" + `backtick`>
   test-overwrite-repository:
     runs-on: ubuntu-22.04
     steps:

action.yml

@@ -42,9 +42,12 @@ runs:
           echo "emoji=large_orange_square" >> $GITHUB_OUTPUT
           echo "color=warning" >> $GITHUB_OUTPUT
         fi
-
-        if [ ! -z '${{ inputs.message }}' ]; then 
-          message='${{ inputs.message }}'
+        input_message=$(cat <<-EOF
+        ${{ inputs.message }}
+        EOF
+        )
+        if [ ! -z $input_message ]; then
+          message=$input_message
         elif [ ! -z '${{ github.event.head_commit.message }}' ]; then 
           # get commit message from `push` trigger
           commit_message=$(echo '${{ github.event.head_commit.message }}' | head -n 1)