[CI] Changed to rules syntax.

scripts/ci/jobs/build_image.yml

 build gcc images:
   stage: .pre
-  only:
-    changes:
+  rules:
+    - changes:
       - ThirdParty/container-maker
       - scripts/ci/jobs/build_image.yml
   tags:
@@ -20,9 +20,10 @@ build gcc images:
 
 build xunit-to-junit image:
   stage: .pre
-  only:
-    changes:
+  rules:
+    - changes:
       - scripts/docker/saxon/**/*
+      - scripts/ci/jobs/build_image.yml
   tags:
     - docker-shell
   variables:
@@ -36,9 +37,10 @@ build xunit-to-junit image:
 
 build pre-commit image:
   stage: .pre
-  only:
-    changes:
+  rules:
+    - changes:
       - scripts/docker/Dockerfile.pre-commit
+      - scripts/ci/jobs/build_image.yml
   tags:
     - docker-shell
   variables:

scripts/docker/Dockerfile.pre-commit

 FROM python:slim
 
-RUN pip install pre-commit
+RUN pip install pre-commit==2.4.0
 CMD ["bash"]
 RUN apt-get update \
  && apt-get install -y --no-install-recommends git curl \