chore: fix broken links in README.md (#1776) (#1524)

* chore: fix cloud cli link in `README.md`

* Revert "chore: fix cloud cli link in `README.md`"

This reverts commit c8bcf7cf3e2acb12183d0d5da9dfe186be5279fc.

* chore: fix cloud cli link in README.md

* cap letters

* fix maven version link
Source-Link: googleapis/synthtool@f0dc278
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:381a48baae37646d72557adaa2c2035a84462cfd830269dfb3847b7d7ca9e96d

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

.github/.OwlBot.lock.yaml

@@ -13,4 +13,4 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:9bf82029163bc06d58f56682afd1893a42ace3e04b0359accb86f79c6ecdc9f9
+  digest: sha256:381a48baae37646d72557adaa2c2035a84462cfd830269dfb3847b7d7ca9e96d

README.md

@@ -82,7 +82,7 @@ The client application making API calls must be granted [authorization scopes][a
 You will need a [Google Cloud Platform Console][developer-console] project with the Cloud Pub/Sub [API enabled][enable-api].
 You will need to [enable billing][enable-billing] to use Google Cloud Pub/Sub.
 [Follow these instructions][create-project] to get your project set up. You will also need to set up the local development environment by
-[installing the Google Cloud SDK][cloud-sdk] and running the following commands in command line:
+[installing the Google Cloud Command Line Interface][cloud-cli] and running the following commands in command line:
 `gcloud auth login` and `gcloud config set project [YOUR PROJECT ID]`.
 
 ### Installation and setup
@@ -404,14 +404,14 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-pubsub/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-pubsub.svg
-[maven-version-link]: https://search.maven.org/search?q=g:com.google.cloud%20AND%20a:google-cloud-pubsub&core=gav
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsub/1.123.5
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles
 [iam-policy]: https://cloud.google.com/iam/docs/overview#cloud-iam-policy
 [developer-console]: https://console.developers.google.com/
 [create-project]: https://cloud.google.com/resource-manager/docs/creating-managing-projects
-[cloud-sdk]: https://cloud.google.com/sdk/
+[cloud-cli]: https://cloud.google.com/cli
 [troubleshooting]: https://github.com/googleapis/google-cloud-common/blob/main/troubleshooting/readme.md#troubleshooting
 [contributing]: https://github.com/googleapis/java-pubsub/blob/main/CONTRIBUTING.md
 [code-of-conduct]: https://github.com/googleapis/java-pubsub/blob/main/CODE_OF_CONDUCT.md#contributor-code-of-conduct