fix(pre-commit): don't try tagging *both* 3 and 4 as "latest"

When pre-commit 4 was added, the "latest" tag wasn't removed from
pre-commit-3.3 meaning that which ended up as "latest" depended on which
would be the most recent image built by CI.

.gitlab-ci.yml

@@ -235,7 +235,7 @@ pre-commit-3.3:
   variables:
     IMAGE_TYPE: pre-commit
     IMAGE_NAME: pre-commit
-    TAGS: latest 3 3.3 3.3-py3.11
+    TAGS: 3 3.3 3.3-py3.11
     PYTHON_VERSION: "3.11-alpine"
     PRE_COMMIT_VERSION: "3.3"
     BUILD_ARGS: "PYTHON_VERSION PRE_COMMIT_VERSION"