Added chmod permissions and cd to correct folder

.github/workflows/e2e.yml

@@ -159,7 +159,9 @@ jobs:
           distribution: 'temurin'
           java-version: 17
       - name: Grant execute permission for gradlew
-        run: chmod +x authorisation-adjustment-example/gradlew
+        run: chmod +x in-person-payments-example/gradlew
+      - name: Build in-person-payments-example with Gradle
+        run: cd in-person-payments-example; ./gradlew build
       - name: Build in-person-payments-example image
         run: docker build -t in-person-payments-example-image:latest in-person-payments-example
       - name: Start in-person-payments-example container, set ADYEN_TERMINAL_API_CLOUD_ENDPOINT to default docker bridge and port 3000