Bump prepackage GitHub plugin version to 2.1.7 (#25443)

server/Makefile

@@ -142,7 +142,7 @@ PLUGIN_PACKAGES += mattermost-plugin-calls-v0.21.1
 PLUGIN_PACKAGES += mattermost-plugin-channel-export-v1.0.0
 PLUGIN_PACKAGES += mattermost-plugin-confluence-v1.3.0
 PLUGIN_PACKAGES += mattermost-plugin-custom-attributes-v1.3.1
-PLUGIN_PACKAGES += mattermost-plugin-github-v2.1.6
+PLUGIN_PACKAGES += mattermost-plugin-github-v2.1.7
 PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.7.0
 PLUGIN_PACKAGES += mattermost-plugin-playbooks-v1.39.1
 PLUGIN_PACKAGES += mattermost-plugin-jenkins-v1.1.0