Update dependency go to v1.21.5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
go (source)	golang	patch	1.21.1 -> 1.21.5

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Release Notes

golang/go (go)

v1.21.5

v1.21.4

v1.21.3

v1.21.2

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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This PR has been generated by Mend Renovate. View repository job log here.

[renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: go.sum

Command failed: go get -d -t ./...
go: downloading connectrpc.com/connect v1.13.0
go: downloading github.com/redis/go-redis/v9 v9.3.0
go: downloading golang.org/x/net v0.19.0
go: downloading google.golang.org/protobuf v1.31.0
go: downloading github.com/cespare/xxhash/v2 v2.2.0
go: downloading github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f
go: downloading golang.org/x/text v0.14.0
go: otomadb.com/ixgyohn/cmd/server imports
	otomadb.com/ixgyohn/gen/proxy/v2: cannot find module providing package otomadb.com/ixgyohn/gen/proxy/v2
go: otomadb.com/ixgyohn/cmd/server imports
	otomadb.com/ixgyohn/gen/proxy/v2/proxyv2connect: cannot find module providing package otomadb.com/ixgyohn/gen/proxy/v2/proxyv2connect