deps: update dependency com.google.cloud:gapic-libraries-bom to v1.21.0 (#1942)

[![Mend Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com) This PR contains the following updates: | Package | Change | Age | Adoption | Passing | Confidence | |---|---|---|---|---|---| | [com.google.cloud:gapic-libraries-bom](https://togithub.com/googleapis/google-cloud-java) | `1.18.0` -> `1.21.0` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:gapic-libraries-bom/1.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:gapic-libraries-bom/1.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:gapic-libraries-bom/1.18.0/1.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:gapic-libraries-bom/1.18.0/1.21.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>googleapis/google-cloud-java (com.google.cloud:gapic-libraries-bom)</summary> ### [`v1.21.0`](https://togithub.com/googleapis/google-cloud-java/blob/HEAD/CHANGELOG.md#1210-2023-09-28) [Compare Source](https://togithub.com/googleapis/google-cloud-java/compare/v1.18.0...v1.21.0) ##### Features - \[dialogflow-cx] add support for AdvancedSettings ([#&#8203;9918](https://togithub.com/googleapis/google-cloud-java/issues/9918)) ([59f9d8c](https://togithub.com/googleapis/google-cloud-java/commit/59f9d8c7ad8fc498f13873fc2b348ea23984f87c)) ##### Bug Fixes - **deps:** update dependency com.google.cloud:google-cloud-pubsub-bom to v1.125.4 ([#&#8203;9915](https://togithub.com/googleapis/google-cloud-java/issues/9915)) ([58249cc](https://togithub.com/googleapis/google-cloud-java/commit/58249cca29b6a8a8b9075231c2e912a4553e5a2b)) ##### Documentation - add links to rpc and rest documentation in repo-metadata.json ([#&#8203;9913](https://togithub.com/googleapis/google-cloud-java/issues/9913)) ([453c1b7](https://togithub.com/googleapis/google-cloud-java/commit/453c1b77b721731cc9175d8c57b918fcd2de7be6)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://developer.mend.io/github/googleapis/java-bigtable). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4wLjMiLCJ1cGRhdGVkSW5WZXIiOiIzNy4wLjMiLCJ0YXJnZXRCcmFuY2giOiJtYWluIn0=-->

Author: renovate-bot

google-cloud-bigtable-deps-bom/pom.xml

@@ -66,7 +66,7 @@
  <dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>gapic-libraries-bom</artifactId>
- <version>1.18.0</version>
+ <version>1.21.0</version>
  <type>pom</type>
  <scope>import</scope>
  </dependency>