chore: release 2.1.2 (#347)

* updated CHANGELOG.md [ci skip]

* updated package.json [ci skip]

* updated samples/package.json

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

kms/package.json

@@ -14,7 +14,7 @@
     "test": "c8 mocha --recursive test/ --timeout=800000"
   },
   "dependencies": {
-    "@google-cloud/kms": "^2.1.1"
+    "@google-cloud/kms": "^2.1.2"
   },
   "devDependencies": {
     "c8": "^7.0.0",