add expression function workflow

Author: sumanthgitty

.github/workflows/expression-functions.yml

@@ -39,7 +39,7 @@ jobs:
 
       - name: Hash files
         run: | 
-        echo "Hash of files: ${{ hashFiles('**/package-lock.json', '**/Gemfile.lock') }}
+          echo "Hash of files: ${{ hashFiles('**/package-lock.json', '**/Gemfile.lock') }}
 
       - name: The job has succeeded
         if: ${{ success() }}