feat(tagmanager): update the API

#### tagmanager:v2

The following keys were added:
- schemas.GalleryReference.properties.galleryTemplateId.description
- schemas.GalleryReference.properties.galleryTemplateId.type

Author: yoshi-automation

discovery/tagmanager-v2.json

@@ -3895,7 +3895,7 @@
       }
     }
   },
-  "revision": "20241204",
+  "revision": "20250129",
   "rootUrl": "https://tagmanager.googleapis.com/",
   "schemas": {
     "Account": {
@@ -5124,6 +5124,10 @@
       "description": "Represents the link between a custom template and an entry on the Community Template Gallery site.",
       "id": "GalleryReference",
       "properties": {
+        "galleryTemplateId": {
+          "description": "ID for the gallery template that is generated once during first sync and travels with the template redirects.",
+          "type": "string"
+        },
         "host": {
           "description": "The name of the host for the community gallery template.",
           "type": "string"

src/apis/tagmanager/v2.ts

@@ -856,6 +856,10 @@ export namespace tagmanager_v2 {
    * Represents the link between a custom template and an entry on the Community Template Gallery site.
    */
   export interface Schema$GalleryReference {
+    /**
+     * ID for the gallery template that is generated once during first sync and travels with the template redirects.
+     */
+    galleryTemplateId?: string | null;
     /**
      * The name of the host for the community gallery template.
      */