exclude deleted config from workflow (#14)

Author: manh-pendle

Diff for: .github/workflows/validate-config.yml

@@ -34,5 +34,5 @@ jobs:
 
       - name: Validate JSON files
         run: |
-          CHANGED_PROTOCOLS=$(git diff --name-only $HEAD_SHA $MAIN_SHA -- 'protocols/*' | grep -v '^D' | grep '^protocols/' | xargs -L1 dirname | sed 's|protocols/||' | sort -u) 
+          CHANGED_PROTOCOLS=$(git diff --name-status $HEAD_SHA $MAIN_SHA -- 'protocols/*' | grep -v '^D' | grep '^protocols/' | xargs -L1 dirname | sed 's|protocols/||' | sort -u) 
           CHANGED_PROTOCOLS=$CHANGED_PROTOCOLS node validate-config.js