deps: update dependency com.google.cloud:google-cloud-pubsub to v1.121.1 (#1278)

[![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:google-cloud-pubsub](https://togithub.com/googleapis/java-pubsub) | `1.121.0` -> `1.121.1` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.121.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.121.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.121.1/compatibility-slim/1.121.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.121.1/confidence-slim/1.121.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### 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**: Renovate will not automatically rebase this PR, because other commits have been found.

🔕 **Ignore**: Close this PR and you won't be reminded about these updates 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://app.renovatebot.com/dashboard#github/googleapis/java-pubsublite).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNC4yOS4yIiwidXBkYXRlZEluVmVyIjoiMzQuMjkuMiJ9-->

Author: renovate-bot

README.md

@@ -24,7 +24,7 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub</artifactId>
-  <version>1.121.0</version>
+  <version>1.121.1</version>
 </dependency>
 
 ```

samples/snapshot/pom.xml

@@ -51,7 +51,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.121.0</version>
+      <version>1.121.1</version>
     </dependency>
 
     <dependency>

samples/snippets/pom.xml

@@ -51,7 +51,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.121.0</version>
+      <version>1.121.1</version>
     </dependency>
     <!-- [END pubsublite_java_dependencies] -->
     <!-- [END pubsublite_install_without_bom] -->