chore: update repo-metadata.json client_documentation link (#599)

Author: eaball35

.repo-metadata.json

@@ -2,7 +2,7 @@
  "name": "recaptchaenterprise",
  "name_pretty": "reCAPTCHA Enterprise",
  "product_documentation": "https://cloud.google.com/recaptcha-enterprise/docs/",
- "client_documentation": "https://googleapis.dev/java/google-cloud-recaptchaenterprise/latest/",
+ "client_documentation": "https://cloud.google.com/java/docs/reference/google-cloud-recaptchaenterprise/latest/history",
  "issue_tracker": "",
  "release_level": "ga",
  "language": "java",

README.md

@@ -206,7 +206,7 @@ Java 11 | [![Kokoro CI][kokoro-badge-image-5]][kokoro-badge-link-5]
 Java is a registered trademark of Oracle and/or its affiliates.
 
 [product-docs]: https://cloud.google.com/recaptcha-enterprise/docs/
-[javadocs]: https://googleapis.dev/java/google-cloud-recaptchaenterprise/latest/
+[javadocs]: https://cloud.google.com/java/docs/reference/google-cloud-recaptchaenterprise/latest/history
 [kokoro-badge-image-1]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-recaptchaenterprise/java7.svg
 [kokoro-badge-link-1]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-recaptchaenterprise/java7.html
 [kokoro-badge-image-2]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-recaptchaenterprise/java8.svg