chore(deps): update dependency com.google.cloud:google-cloud-firestore to v3.0.9 (#6461)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-firestore](https://togithub.com/googleapis/java-firestore) | `3.0.8` -> `3.0.9` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-firestore/3.0.9/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-firestore/3.0.9/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-firestore/3.0.9/compatibility-slim/3.0.8)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-firestore/3.0.9/confidence-slim/3.0.8)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-firestore</summary>

### [`v3.0.9`](https://togithub.com/googleapis/java-firestore/blob/master/CHANGELOG.md#&#8203;309-httpswwwgithubcomgoogleapisjava-firestorecomparev308v309-2021-12-03)

[Compare Source](https://togithub.com/googleapis/java-firestore/compare/v3.0.8...v3.0.9)

</details>

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functions/firebase/firestore-reactive/pom.xml

@@ -44,7 +44,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-firestore</artifactId>
-      <version>3.0.8</version>
+      <version>3.0.9</version>
     </dependency>
 
     <!-- Required for Function primitives -->

functions/firebase/firestore/pom.xml

@@ -40,7 +40,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-firestore</artifactId>
-      <version>3.0.8</version>
+      <version>3.0.9</version>
     </dependency>
 
     <!-- Required for Function primitives -->

session-handling/pom.xml

@@ -47,7 +47,7 @@ Copyright 2019 Google LLC
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-firestore</artifactId>
-      <version>3.0.8</version>
+      <version>3.0.9</version>
     </dependency>
 
     <dependency>