deps: update dependency com.google.cloud:google-cloud-logging-bom to v3.20.6

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.cloud:google-cloud-logging-bom	3.20.5 -> 3.20.6

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Release Notes

googleapis/java-logging (com.google.cloud:google-cloud-logging-bom)

### [`v3.20.6`](https://redirect.github.com/googleapis/java-logging/blob/HEAD/CHANGELOG.md#3206-2024-10-26) [Compare Source](https://redirect.github.com/googleapis/java-logging/compare/v3.20.5...v3.20.6) ##### Dependencies - Update sdk platform java dependencies ([#​1717](https://redirect.github.com/googleapis/java-logging/issues/1717)) ([ee9ef91](https://redirect.github.com/googleapis/java-logging/commit/ee9ef91a9ebaed9faa5870a29be40b0c1531a226))

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