fix(deps): update github.com/city404/v6-public-rpc-proto/go digest to 20fb0a0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/city404/v6-public-rpc-proto/go	require	digest	90f8e24 → 20fb0a0

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[renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 4 additional dependencies were updated

Details:

Package	Change
golang.org/x/mod	v0.30.0 -> v0.31.0
golang.org/x/text	v0.32.0 -> v0.33.0
golang.org/x/tools	v0.39.0 -> v0.40.0
google.golang.org/genproto/googleapis/rpc	v0.0.0-20251222181119-0a764e51fe1b -> v0.0.0-20260128011058-8636f8732409