Fix incorrect Docker image reference in CI

Author: crocodilestick

.github/workflows/tests.yml

@@ -138,7 +138,7 @@ jobs:
       
       - name: Pull/cache Docker images
         run: |
-          docker pull doubleuynn/calibre-web-automated:latest || true
+          docker pull crocodilestick/calibre-web-automated:latest || true
           docker pull python:3.13-slim || true
       
       - name: Run Docker integration tests

CONTRIBUTORS

@@ -303,7 +303,7 @@ Copyright (C) 2024-2025 Calibre-Web Automated contributors
 - zhiyue (1 commits)
 # Fork Contributors (crocodilestick/calibre-web-automated)
 
-- crocodilestick (783 commits)
+- crocodilestick (784 commits)
 - jmarmstrong1207 (73 commits)
 - demitrix (30 commits)
 - sirwolfgang (29 commits)