chore(deps): update dependency com.google.cloud:google-cloud-notifica…

…tion to v0.121.9-beta (#285)

[![WhiteSource 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:google-cloud-notification | `0.121.8-beta` -> `0.121.9-beta` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-notification/0.121.9-beta/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-notification/0.121.9-beta/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-notification/0.121.9-beta/compatibility-slim/0.121.8-beta)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-notification/0.121.9-beta/confidence-slim/0.121.8-beta)](https://docs.renovatebot.com/merge-confidence/) |

---

### Configuration

:date: **Schedule**: At any time (no schedule defined).

:vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

:recycle: **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

:no_bell: **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 [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/java-notification).

samples/install-without-bom/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-notification</artifactId>
-      <version>0.121.8-beta</version>
+      <version>0.121.9-beta</version>
     </dependency>
 
     <dependency>

samples/snippets/pom.xml

@@ -40,7 +40,7 @@
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-notification</artifactId>
       <!-- TODO: REMOVE VERSION SPECIFIED BELOW WHEN THE CLIENT GOES GA-->
-      <version>0.121.8-beta</version>
+      <version>0.121.9-beta</version>
     </dependency>
 
     <dependency>