Add parenthesis

Author: RickyCartner

.github/workflows/test-loop.yml

@@ -22,10 +22,10 @@ jobs:
       - name: Define JSON
         id: json-project-step
         run: |
-          echo 'json-project= \
+          echo 'json-project=$( \
           {\"count\":4,\"include\":[{\"project\":\"foo\",\"config\":\"Debug\"}, \
-          {\"project\":\"bar\",\"config\":\"Release\"}]}' \
-          >> "$GITHUB_OUTPUT"
+          {\"project\":\"bar\",\"config\":\"Release\"}]} \
+          ') >> "$GITHUB_OUTPUT"
 
   ## Job 2: Print the output of the "define-matrix" job
   print-output: