fix(deps): update dependency com.google.cloud.bigtable:bigtable-hbase-1.x to v2.8.0 (GoogleCloudPlatform#8041)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud.bigtable:bigtable-hbase-1.x](https://cloud.google.com/bigtable/) ([source](https://togithub.com/googleapis/java-bigtable-hbase)) | `2.7.4` -> `2.8.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud.bigtable:bigtable-hbase-1.x/2.8.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud.bigtable:bigtable-hbase-1.x/2.8.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud.bigtable:bigtable-hbase-1.x/2.8.0/compatibility-slim/2.7.4)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud.bigtable:bigtable-hbase-1.x/2.8.0/confidence-slim/2.7.4)](https://docs.renovatebot.com/merge-confidence/) |

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### ⚠ Dependency Lookup Warnings ⚠

Warnings were logged while processing this repo. Please check the Dependency Dashboard for more information.

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### Release Notes

<details>
<summary>googleapis/java-bigtable-hbase</summary>

### [`v2.8.0`](https://togithub.com/googleapis/java-bigtable-hbase/blob/HEAD/CHANGELOG.md#&#8203;280-httpsgithubcomgoogleapisjava-bigtable-hbasecomparev274v280-2023-05-10)

[Compare Source](https://togithub.com/googleapis/java-bigtable-hbase/compare/v2.7.4...v2.8.0)

##### Features

-   Optimize dataflow job start by making sample row keys lighter ([#&GoogleCloudPlatform#8203;4075](https://togithub.com/googleapis/java-bigtable-hbase/issues/4075)) ([f0f453d](https://togithub.com/googleapis/java-bigtable-hbase/commit/f0f453d64f2e1f1c1560a6bc63edfc7320d17f90))

##### Bug Fixes

-   Prevent connections from leaking for reads ([#&GoogleCloudPlatform#8203;4073](https://togithub.com/googleapis/java-bigtable-hbase/issues/4073)) ([56d32bd](https://togithub.com/googleapis/java-bigtable-hbase/commit/56d32bd09cb24bc84f1df85df7ad066275b26d9d))

</details>

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Author: renovate-bot

bigtable/hbase/snippets/pom.xml

@@ -62,7 +62,7 @@
     <dependency>
       <groupId>com.google.cloud.bigtable</groupId>
       <artifactId>bigtable-hbase-1.x</artifactId>
-      <version>2.7.4</version>
+      <version>2.8.0</version>
     </dependency>
 
     <!-- test dependencies-->