Bumping prepackaged GitLab plugin version to v1.12.1 (#35595) (#35602)

Automatic Merge

server/Makefile

@@ -144,7 +144,7 @@ TEMPLATES_DIR=templates
 PLUGIN_PACKAGES ?= $(PLUGIN_PACKAGES:)
 PLUGIN_PACKAGES += mattermost-plugin-calls-v1.11.1
 PLUGIN_PACKAGES += mattermost-plugin-github-v2.5.0
-PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.10.0
+PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.12.1
 PLUGIN_PACKAGES += mattermost-plugin-jira-v4.5.0
 # We need to prepackage both versions of playbooks and install the correct one based on the server license. See MM-60025.
 PLUGIN_PACKAGES += mattermost-plugin-playbooks-v1.41.1