deps: update dependency com.google.cloud:google-cloud-spanner-bom to v6.64.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.cloud:google-cloud-spanner-bom	6.63.0 -> 6.64.0

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Release Notes

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

v6.64.0

Compare Source

Features

• Add endpoint connection URL property (#​2969) (c9be29c)
• Add PG OID support (#​2736) (ba2a4af)
• Add SessionPoolOptions, SpannerOptions protos in executor protos (#​2932) (1673fd7)
• Support max_commit_delay in Connection API (#​2954) (a8f1852)

Bug Fixes

• Executor framework changes skipped in clirr checks, and added exception for partition methods in admin class (#​3000) (c2d8e95)

Dependencies

• Update actions/checkout action to v4 (#​3006) (368a9f3)
• Update actions/github-script action to v7 (#​3007) (b0cfea6)
• Update actions/setup-java action to v4 (#​3008) (d337080)
• Update dependency com.google.cloud:google-cloud-monitoring to v3.42.0 (#​2997) (0615beb)
• Update dependency com.google.cloud:google-cloud-trace to v2.41.0 (#​2998) (f50cd04)
• Update dependency commons-io:commons-io to v2.16.1 (#​3020) (aafd5b9)
• Update opentelemetry.version to v1.37.0 (#​3021) (8f1ed2a)
• Update stcarolas/setup-maven action to v5 (#​3009) (541acd2)

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