deps: update dependency com.google.cloud:google-cloud-storage to v2.56.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.cloud:google-cloud-storage	2.55.0 -> 2.56.0

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Release Notes

googleapis/java-storage (com.google.cloud:google-cloud-storage)

v2.56.0

Compare Source

Features

• breaking behavior rewrite Storage.blobAppendableUpload to be non-blocking and have improved throughput (#​3231) (7bd73d3)
• Add AppendableUploadWriteableByteChannel#flush() (#​3261) (950c56f)
• Add MinFlushSizeFlushPolicy#withMaxPendingBytes(long) (#​3231) (7bd73d3)
• Add StorageChannelUtils to provide helper methods to perform blocking read/write to/from non-blocking channels (#​3231) (7bd73d3)

Bug Fixes

• Make FlushPolicy${Min,Max}FlushSizeFlushPolicy constructors private (#​3217) (7bd73d3)
• Update BlobAppendableUploadConfig and FlushPolicy.MinFlushSizeFlushPolicy to default to 4MiB minFlushSize and 16MiB maxPendingBytes (#​3249) (7bd73d3)
• Update otel integration to properly activate span context for lazy RPCs such as reads & writes (#​3255) (d6587f4)

Dependencies

• Update actions/checkout action to v5 (#​3239) (33f024b)
• Update dependency com.google.apis:google-api-services-storage to v1-rev20250815-2.0.0 (#​3245) (87afe1a)
• Update dependency com.google.cloud:sdk-platform-java-config to v3.52.0 (#​3250) (0782e62)

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[dpebot]

/gcbrun