chore: Update update-charts workflow to exclude update_summary.txt and improve notification payload

.github/workflows/update-charts.yml

@@ -38,7 +38,7 @@ jobs:
         run: |
           git config --global user.name "github-actions[bot]"
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
-          git add .
+          git add --all -- ':!update_summary.txt'
           git commit -m "chore: Automated version update for Helm charts"
           git pull --rebase origin main
           git push
@@ -55,12 +55,14 @@ jobs:
             exit 0
           fi
           SUMMARY=$(cat update_summary.txt)
-          MESSAGE="🚀 **Helm Charts Updated**\n\n$SUMMARY\n\nView changes: https://github.com/shadoll/helm-charts/commits/main"
-          
+          MESSAGE=$(printf '🚀 Helm Charts Updated\n\n%s\n\nView changes: https://github.com/shadoll/helm-charts/commits/main' "$SUMMARY")
+
+          PAYLOAD=$(jq -n \
+            --arg msg "$MESSAGE" \
+            --arg num "$SIGNAL_SENDER" \
+            --arg rec "$SIGNAL_RECIPIENT" \
+            '{message: $msg, number: $num, recipients: [$rec]}')
+
           curl -X POST "$SIGNAL_URL" \
                -H "Content-Type: application/json" \
-               -d "{
-                 \"message\": \"$MESSAGE\",
-                 \"number\": \"$SIGNAL_SENDER\",
-                 \"recipients\": [\"$SIGNAL_RECIPIENT\"]
-               }"
+               -d "$PAYLOAD"