ci: splunk-sdk does not support python 3.12

https://github.com/splunk/splunk-sdk-python/issues/548

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: python:slim
+image: python:3.11-slim
 
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
@@ -56,7 +56,8 @@ release_job:
   stage: release
   image: registry.gitlab.com/gitlab-org/release-cli:latest
   rules:
-    - if: $CI_COMMIT_TAG # Run this job when a tag is created manually
+    # Run this job when a tag is created manually
+    - if: $CI_COMMIT_TAG
   script:
     - echo "Running the release job."
   release: