deps: update dependency com.google.cloud:google-cloud-pubsub to v1.120.20 (#1526)

[![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) | `1.120.18` -> `1.120.20` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.120.20/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.120.20/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.120.20/compatibility-slim/1.120.18)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.120.20/confidence-slim/1.120.18)](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, click this checkbox. ⚠ **Warning**: custom changes will be lost.

---

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-bigquerydatatransfer).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzMi4yMTcuMCIsInVwZGF0ZWRJblZlciI6IjMyLjIxNy4wIn0=-->

Author: renovate-bot

README.md

@@ -56,13 +56,13 @@ implementation 'com.google.cloud:google-cloud-bigquerydatatransfer'
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-bigquerydatatransfer:2.3.15'
+implementation 'com.google.cloud:google-cloud-bigquerydatatransfer:2.3.16'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigquerydatatransfer" % "2.3.15"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigquerydatatransfer" % "2.3.16"
 ```
 
 ## Authentication

samples/install-without-bom/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.120.18</version>
+      <version>1.120.20</version>
       <scope>test</scope>
     </dependency>
   </dependencies>

samples/snapshot/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.120.18</version>
+      <version>1.120.20</version>
       <scope>test</scope>
     </dependency>
   </dependencies>

samples/snippets/pom.xml

@@ -71,7 +71,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.120.18</version>
+      <version>1.120.20</version>
       <scope>test</scope>
     </dependency>
   </dependencies>