Update valkey/valkey Docker tag from 9.0.4 to v9.1.0 (docker-compose.yml)

[renovate]

This PR contains the following updates:

Package	Update	Change
valkey/valkey	minor	9.0.4-alpine → 9.1.0-alpine

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Release Notes

valkey-io/valkey (valkey/valkey)

v9.1.0

Compare Source

Upgrade urgency LOW: This is the first stable release of Valkey 9.1.

Security fixes

• (CVE-2026-23479) Use-After-Free in unblock client flow
• (CVE-2026-25243) Invalid Memory Access in RESTORE command
• (CVE-2026-23631) Use-after-free when full sync occurs during a yielding Lua/function execution

New Features and enhanced behavior

• Add cluster bus network traffic usage metric in bytes by @​hpatro (#​3396)
• Reduce latency spikes during rehashing via incremental page release by @​chzhoo (#​3481)

Bug Fixes

• Fix(syncio): Set errno on EOF in syncRead and propagate to conn->last by @​abmathur-ie (#​3580)
• Fix GEOSEARCH BYPOLYGON leak on invalid COUNT by @​bandalgomsu (#​3568)
• Handle NULL pointer in streamTrim listpack delta calculation by @​smkher (#​3591)
• Fixes server crash when RDMA benchmark clients disconnect by @​quanyeyang (#​3448)
• Fix the memory leak in valkey-benchmark by @​nmvk (#​3643)

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