deps: update dependency com.google.cloud:google-cloud-redis-bom to v2.6.0 (#4635)

[![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-redis-bom](https://togithub.com/googleapis/java-redis) | `2.5.0` -> `2.6.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-redis-bom/2.6.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-redis-bom/2.6.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-redis-bom/2.6.0/compatibility-slim/2.5.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-redis-bom/2.6.0/confidence-slim/2.5.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v2.6.0`](https://togithub.com/googleapis/java-redis/blob/HEAD/CHANGELOG.md#&#8203;260-httpsgithubcomgoogleapisjava-rediscomparev250v260-2022-07-01)

[Compare Source](https://togithub.com/googleapis/java-redis/compare/v2.5.0...v2.6.0)

##### Features

-   Enable REST transport for most of Java and Go clients ([#&#8203;656](https://togithub.com/googleapis/java-redis/issues/656)) ([05d53ca](https://togithub.com/googleapis/java-redis/commit/05d53ca8db8b5180a404e390b80f48bb6095aee5))

##### Bug Fixes

-   update gapic-generator-java with mock service generation fixes ([#&#8203;659](https://togithub.com/googleapis/java-redis/issues/659)) ([3d4155f](https://togithub.com/googleapis/java-redis/commit/3d4155fa00a4227a9e61569ebc41d4743badf92b))

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.13.0 ([#&#8203;655](https://togithub.com/googleapis/java-redis/issues/655)) ([b1df9cb](https://togithub.com/googleapis/java-redis/commit/b1df9cbc0af806dbd2304dd7e87077ce00d766a1))

</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).

Author: renovate-bot

google-cloud-bom/pom.xml

@@ -674,7 +674,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-redis-bom</artifactId>
-        <version>2.5.0</version>
+        <version>2.6.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>