fixed hash expression syntax

Author: v3locide

.github/workflows/expression-functions.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Parse JSON string
         run: echo "Parsed JSON ${{ fromJSON('{"hello":"world"}').hello }}"
       - name: Hash files
-        run: echo "Hash of files ${{ hashFiles('**/package-lock.json', '**/Gemfile.lock') }}
+        run: echo "Hash of files ${{ hashFiles('**/package-lock.json', '**/Gemfile.lock') }}"
       - name: The job has succeeded
         if: ${{ success() }}
         run: echo "Job ended successfully!"