ci: Fix script to run on forks

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>

Author: naushir

.github/workflows/camera-test-libpisp.yml

@@ -10,8 +10,6 @@ permissions:
 jobs:
   trigger-camera-tests:
     runs-on: [self-hosted, camera-test-bridge]
-    if: >-
-      github.event.pull_request.head.repo.full_name == github.repository
     timeout-minutes: 120
     steps:
       - name: Checkout camera_tester