Change formatting of input_tag var

Author: hsubox76

.github/workflows/e2e-test.yml

@@ -43,7 +43,8 @@ jobs:
         echo "export const config = $PROJECT_CONFIG; export const testAccount = $TEST_ACCOUNT" > firebase-config.js
     - name: Yarn install
       run: |
-        yarn add firebase@$INPUT_TAG
+        echo $INPUT_TAG
+        yarn add firebase@${INPUT_TAG}
         yarn
     - name: Deploy "callTest" cloud function
       run: |