Actually run lint jobs when they have to

See commit descriptions for details.

.gitlab-ci.yml

@@ -16,17 +16,19 @@ docs_lint:
   rules:
     - if: '$CI_COMMIT_TAG'
       when: never
+    - if: $CI_PIPELINE_SOURCE == "push"
   script:
     - dnf install -y python-pip
     - python3 -m pip install linkcheckmd
     - python3 -m linkcheckmd -v README.md
-    - python3 -m linkcheckmd -v docs/*
+    - python3 -m linkcheckmd -v docs
 
 yaml_lint:
   stage: lint
   rules:
     - if: '$CI_COMMIT_TAG'
       when: never
+    - if: $CI_PIPELINE_SOURCE == "push"
   script:
     - dnf install -y epel-release
     - dnf install -y yamllint