chore(deps): update dependency com.google.cloud:google-cloud-monitoring to v2.0.6 (#4073)
chore(deps): update dependency com.google.cloud:google-cloud-monitoring to v2.0.6 (#4073)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-monitoring](https://togithub.com/googleapis/java-monitoring) | patch | `2.0.5` -> `2.0.6` |

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### Release Notes

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

### [`v2.0.6`](https://togithub.com/googleapis/java-monitoring/blob/master/CHANGELOG.md#&#8203;206-httpswwwgithubcomgoogleapisjava-monitoringcomparev205v206-2020-10-22)

[Compare Source](https://togithub.com/googleapis/java-monitoring/compare/v2.0.5...v2.0.6)

</details>

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