fix(deps): update gapic-generator-java-bom.version to v2.63.0 (#4217)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
|
[com.google.api:gapic-generator-java](https://redirect.github.com/googleapis/sdk-platform-java)
| `2.62.3` -> `2.63.0` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.api:gapic-generator-java/2.63.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.api:gapic-generator-java/2.62.3/2.63.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
|
[com.google.api:gapic-generator-java-bom](https://redirect.github.com/googleapis/sdk-platform-java)
| `2.62.3` -> `2.63.0` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.api:gapic-generator-java-bom/2.63.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.api:gapic-generator-java-bom/2.62.3/2.63.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>googleapis/sdk-platform-java
(com.google.api:gapic-generator-java)</summary>

###
[`v2.63.0`](https://redirect.github.com/googleapis/sdk-platform-java/blob/HEAD/CHANGELOG.md#2630-2025-10-16)

[Compare
Source](https://redirect.github.com/googleapis/sdk-platform-java/compare/v2.62.3...v2.63.0)

##### Features

- **librariangen:** add bazel package
([#&#8203;3940](https://redirect.github.com/googleapis/sdk-platform-java/issues/3940))
([feabef3](https://redirect.github.com/googleapis/sdk-platform-java/commit/feabef32c4c45be0fb1db3615568365b902ece24))
- **librariangen:** add execv package
([#&#8203;3932](https://redirect.github.com/googleapis/sdk-platform-java/issues/3932))
([f6b0b47](https://redirect.github.com/googleapis/sdk-platform-java/commit/f6b0b47a14eddd9c76540362b5922a5acc56b5d4))
- **librariangen:** add protoc package
([#&#8203;3935](https://redirect.github.com/googleapis/sdk-platform-java/issues/3935))
([598de06](https://redirect.github.com/googleapis/sdk-platform-java/commit/598de0697957ea3b05b1347c0898108648c3d7d1))
- **librariangen:** add request package
([#&#8203;3933](https://redirect.github.com/googleapis/sdk-platform-java/issues/3933))
([fe44aed](https://redirect.github.com/googleapis/sdk-platform-java/commit/fe44aede2aba9627db4aa0397d2ac4de353cea03))
- **librariangen:** scaffold Java language container for Librarian
([#&#8203;3926](https://redirect.github.com/googleapis/sdk-platform-java/issues/3926))
([29d188d](https://redirect.github.com/googleapis/sdk-platform-java/commit/29d188d20e530570f46774b37d88703822774a33))

##### Dependencies

- Bump errorprone-annotations to v2.42.0
([8d6c1f9](https://redirect.github.com/googleapis/sdk-platform-java/commit/8d6c1f915ba5f0c4ac9b89120e63dddd62e37a22))
- Bump guava to v33.5.0
([8d6c1f9](https://redirect.github.com/googleapis/sdk-platform-java/commit/8d6c1f915ba5f0c4ac9b89120e63dddd62e37a22))
- Bump j2objc-annotations to v3.1
([8d6c1f9](https://redirect.github.com/googleapis/sdk-platform-java/commit/8d6c1f915ba5f0c4ac9b89120e63dddd62e37a22))
- update google auth library dependencies to v1.40.0
([#&#8203;3945](https://redirect.github.com/googleapis/sdk-platform-java/issues/3945))
([1d74663](https://redirect.github.com/googleapis/sdk-platform-java/commit/1d7466332b5dc13fde6ed687247873135a5fa919))
- Upgrade Google Http Java Client to v2.0.2
([#&#8203;3946](https://redirect.github.com/googleapis/sdk-platform-java/issues/3946))
([7fb4f15](https://redirect.github.com/googleapis/sdk-platform-java/commit/7fb4f155eef478c1a66bc2f1fdecd7565d225b3e))

</details>

---

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Author: renovate-bot

spring-cloud-generator/pom.xml

@@ -15,7 +15,7 @@
     <description>Spring Code Generator for Google Cloud</description>
 
     <properties>
-        <gapic-generator-java-bom.version>2.62.3</gapic-generator-java-bom.version>
+        <gapic-generator-java-bom.version>2.63.0</gapic-generator-java-bom.version>
         <!-- [gapic-test]: protobuf.version for compiling protos used in unit testing
              this should be consistent with version in gapic-generator-java-bom -->
         <protobuf.version>3.25.8</protobuf.version>