deps: update dependency com.google.cloud:google-cloud-os-config-bom t…

…o v2.5.6 (#5423)

[![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-os-config-bom](https://togithub.com/googleapis/java-os-config) | `2.5.5` -> `2.5.6` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-os-config-bom/2.5.6/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-os-config-bom/2.5.6/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-os-config-bom/2.5.6/compatibility-slim/2.5.5)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-os-config-bom/2.5.6/confidence-slim/2.5.5)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/java-os-config</summary>

### [`v2.5.6`](https://togithub.com/googleapis/java-os-config/blob/HEAD/CHANGELOG.md#&#8203;256-httpsgithubcomgoogleapisjava-os-configcomparev255v256-2022-10-05)

[Compare Source](https://togithub.com/googleapis/java-os-config/compare/v2.5.5...v2.5.6)

##### Bug Fixes

-   update protobuf to v3.21.7 ([e8e2da5](https://togithub.com/googleapis/java-os-config/commit/e8e2da55a237b6f702dcf8fe3c1970a5707bf1f5))

</details>

---

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

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox.

---

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-cloud-bom).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzMi4yMTcuMCIsInVwZGF0ZWRJblZlciI6IjMyLjIxNy4wIn0=-->

google-cloud-bom/pom.xml

@@ -611,7 +611,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-os-config-bom</artifactId>
-        <version>2.5.5</version>
+        <version>2.5.6</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>