docs: fix node release schedule link (#1157)

Co-authored-by: Jeffrey Rennie <rennie@google.com>

Source-Link: https://togithub.com/googleapis/synthtool/commit/1a2431537d603e95b4b32317fb494542f75a2165
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest@sha256:e08f9a3757808cdaf7a377e962308c65c4d7eff12db206d4fae702dd50d43430

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:ef104a520c849ffde60495342ecf099dfb6256eab0fbd173228f447bc73d1aa9
-# created: 2023-07-10T21:36:52.433664553Z
+  digest: sha256:e08f9a3757808cdaf7a377e962308c65c4d7eff12db206d4fae702dd50d43430
+# created: 2023-08-03T18:46:14.719706948Z

README.md

@@ -141,7 +141,7 @@ also contains samples.
 
 ## Supported Node.js Versions
 
-Our client libraries follow the [Node.js release schedule](https://nodejs.org/en/about/releases/).
+Our client libraries follow the [Node.js release schedule](https://github.com/nodejs/release#release-schedule).
 Libraries are compatible with all current _active_ and _maintenance_ versions of
 Node.js.
 If you are using an end-of-life version of Node.js, we recommend that you update