Release: v2.1.5 (#437)

## What's Changed
* Document ID Token lifetimes by @sethvargo in
#433
* fix !project_id error message typo by @seth-acuitymd in
#435
* Update deps by @sethvargo in
#436

## New Contributors
* @seth-acuitymd made their first contribution in
#435

**Full Changelog**:
v2.1.4...0a94a84

Author: google-github-actions-bot

dist/main/index.js

@@ -1,6 +1,6 @@
 {
   "name": "@google-github-actions/auth",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "Authenticate to Google Cloud using OIDC tokens or JSON service account keys.",
   "main": "dist/main/index.js",
   "scripts": {