Release: v2.1.10 (#484)

## What's Changed
* Declare workflow permissions by @sethvargo in
#482
* Document that the OIDC token expires in 5min by @sethvargo in
#483


**Full Changelog**:
v2.1.9...v2.1.10

Author: google-github-actions-bot

dist/main/index.js

@@ -1,6 +1,6 @@
 {
   "name": "@google-github-actions/auth",
-  "version": "2.1.9",
+  "version": "2.1.10",
   "description": "Authenticate to Google Cloud using OIDC tokens or JSON service account keys.",
   "main": "dist/main/index.js",
   "scripts": {