Bump prepackage Github plugin version to 2.4.0 (#30668)

Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

server/Makefile

@@ -137,7 +137,7 @@ TEMPLATES_DIR=templates
 # Plugins Packages
 PLUGIN_PACKAGES ?= $(PLUGIN_PACKAGES:)
 PLUGIN_PACKAGES += mattermost-plugin-calls-v1.7.1
-PLUGIN_PACKAGES += mattermost-plugin-github-v2.3.0
+PLUGIN_PACKAGES += mattermost-plugin-github-v2.4.0
 PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.10.0
 PLUGIN_PACKAGES += mattermost-plugin-jira-v4.2.1
 # We need to prepackage both versions of playbooks and install the correct one based on the server license. See MM-60025.