build(deps): bump google.golang.org/grpc from 1.82.0 to 1.82.1

[dependabot]

Bumps google.golang.org/grpc from 1.82.0 to 1.82.1.

Release notes

Sourced from google.golang.org/grpc's releases.

Release 1.82.1

Security

• server: Stop reading from the connection when flooded by HTTP/2 frames. The default value for this limit is 100 frames, excluding DATA and HEADERS, and may be changed by setting environment variable GRPC_GO_EXPERIMENTAL_CONTROL_BUFFER_THROTTLE_LIMIT.
• xds/rbac: Support Metadata and RequestedServerName permissions matcher fields. If present in a DENY rule, previously these would be ignored and fail-open.
• xds/rbac: Fix panic when parsing unsupported fields in NotRule/NotId permissions.
• xds/rbac: Support the deprecated source_ip principal identifier by treating it as equivalent to direct_remote_ip.

Commits

• ebd8f06 Change version to 1.82.1 (#9238)
• 4ea465d Cherry-pick commits (#9236)
• 9494a2c Change version to 1.82.1-dev (#9171)
• See full diff in compare view

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Note

Low Risk
Lockfile-only patch bump with no ko code changes; low risk though gRPC is used transitively for RPC-heavy tooling (e.g. registry/cosign stacks).

Overview
Bumps the indirect google.golang.org/grpc dependency from 1.82.0 to 1.82.1 in go.mod and go.sum. There are no application or source changes in this PR.

The upstream 1.82.1 release is a patch with security and hardening fixes (e.g. limiting server reads under HTTP/2 frame floods, xDS RBAC matcher and panic fixes). For ko, this is a transitive dependency update only.

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