deps: update dependency com.google.cloud:google-cloud-spanner-bom to v6.81.2

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
com.google.cloud:google-cloud-spanner-bom	import	minor	6.80.1 -> 6.81.2

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Release Notes

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

v6.81.2

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Bug Fixes

• Directpath enabled attribute (#​3477) (ea1ebad)

Dependencies

• Update dependency com.google.api.grpc:proto-google-cloud-monitoring-v3 to v3.55.0 (#​3482) (bf350b0)
• Update dependency com.google.api.grpc:proto-google-cloud-trace-v1 to v2.53.0 (#​3454) (8729b30)
• Update dependency com.google.cloud:google-cloud-trace to v2.53.0 (#​3464) (a507e4c)
• Update dependency com.google.cloud:google-cloud-trace to v2.54.0 (#​3488) (1d1fecf)
• Update googleapis/sdk-platform-java action to v2.50.0 (#​3475) (e992f18)
• Update sdk platform java dependencies (#​3476) (acb6446)

v6.81.1

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Bug Fixes

• Client built in metrics. Skip export if instance id is null (#​3447) (8b2e5ef)
• spanner: Avoid blocking thread in AsyncResultSet (#​3446) (7c82f1c)

Dependencies

• Update dependency com.google.api.grpc:proto-google-cloud-monitoring-v3 to v3.54.0 (#​3437) (7e28326)
• Update dependency com.google.cloud:google-cloud-monitoring to v3.54.0 (#​3438) (fa18894)
• Update dependency com.google.cloud:google-cloud-trace to v2.53.0 (#​3440) (314eeb8)
• Update dependency io.opentelemetry:opentelemetry-bom to v1.44.1 (#​3452) (6518eea)
• Update opentelemetry.version to v1.44.1 (#​3451) (d9b0271)

Documentation

• Update samples' README.md to ensure given (#​3420) (663a974)

v6.81.0

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Features

• Client built in metrics (#​3408) (6a36103)

Dependencies

• Update dependency com.google.cloud:google-cloud-monitoring to v3.54.0 (#​3439) (cdec63f)

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