[renovate] Update renovate/renovate Docker tag to v35.159.7

See merge request !507

Co-authored-by: Fabian Seidl <fabian.seidl@h-da.de>
Co-authored-by: Renovate Bot <renovate@danet.fbi.h-da.de>

.gitlab/ci/.renovate.yml

 renovate:
     stage: tools
 
-    image: renovate/renovate:35.115.2-slim
+    image: renovate/renovate:36.34.0
 
     variables:
         LOG_LEVEL: debug