deps: update dependency com.google.cloud:google-cloud-shell-bom to v2.2.8 (#5375)
deps: update dependency com.google.cloud:google-cloud-shell-bom to v2.2.8 (#5375)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-shell-bom](https://togithub.com/googleapis/java-shell) | `2.2.7` -> `2.2.8` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shell-bom/2.2.8/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shell-bom/2.2.8/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shell-bom/2.2.8/compatibility-slim/2.2.7)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shell-bom/2.2.8/confidence-slim/2.2.7)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v2.2.8`](https://togithub.com/googleapis/java-shell/blob/HEAD/CHANGELOG.md#&#8203;228-httpsgithubcomgoogleapisjava-shellcomparev227v228-2022-10-05)

[Compare Source](https://togithub.com/googleapis/java-shell/compare/v2.2.7...v2.2.8)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.0.4 ([#&#8203;269](https://togithub.com/googleapis/java-shell/issues/269)) ([ae92683](https://togithub.com/googleapis/java-shell/commit/ae92683b920d6fd98f186e7013044719dad95ceb))
-   Update dependency jinja2 to v3.1.2 ([#&#8203;258](https://togithub.com/googleapis/java-shell/issues/258)) ([dd25cbc](https://togithub.com/googleapis/java-shell/commit/dd25cbc91d59facf0a3fdb76a77d8a71d64a7ca0))
-   Update dependency keyring to v23.9.3 ([#&#8203;259](https://togithub.com/googleapis/java-shell/issues/259)) ([7769f1e](https://togithub.com/googleapis/java-shell/commit/7769f1e9a9cc7a058d65667314df2963313d9188))
-   Update dependency markupsafe to v2.1.1 ([#&#8203;260](https://togithub.com/googleapis/java-shell/issues/260)) ([3b66c4e](https://togithub.com/googleapis/java-shell/commit/3b66c4e11d1a799b097d2b59425076ecd752a480))
-   Update dependency protobuf to v3.20.2 ([#&#8203;261](https://togithub.com/googleapis/java-shell/issues/261)) ([9d842ca](https://togithub.com/googleapis/java-shell/commit/9d842ca25d2d6c97845e089abf13f523c88beb5a))
-   Update dependency protobuf to v4 ([#&#8203;266](https://togithub.com/googleapis/java-shell/issues/266)) ([d6c21e4](https://togithub.com/googleapis/java-shell/commit/d6c21e40871aa1fe751641826a91b6e0d0805b92))
-   Update dependency pyjwt to v2.5.0 ([#&#8203;262](https://togithub.com/googleapis/java-shell/issues/262)) ([e5194df](https://togithub.com/googleapis/java-shell/commit/e5194df1217b3af9e5e25b1b5a811f8cda006349))
-   Update dependency requests to v2.28.1 ([#&#8203;263](https://togithub.com/googleapis/java-shell/issues/263)) ([defd300](https://togithub.com/googleapis/java-shell/commit/defd30095abd34c2c0ebe232d6a70068a0c76b53))
-   Update dependency typing-extensions to v4.3.0 ([#&#8203;264](https://togithub.com/googleapis/java-shell/issues/264)) ([934e15c](https://togithub.com/googleapis/java-shell/commit/934e15c677c4d2db72c74a5b162c9849d472cf17))
-   Update dependency zipp to v3.8.1 ([#&#8203;265](https://togithub.com/googleapis/java-shell/issues/265)) ([fb953ea](https://togithub.com/googleapis/java-shell/commit/fb953eae17f62b96d70d02c6ab021a497ec0d722))

</details>

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