housekeeping: Update google.golang.org/genproto/googleapis/api digest to e639e21

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
google.golang.org/genproto/googleapis/api	require	digest	8c6c420 -> e639e21

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[renovate]

ℹ Artifact update notice

File name: backend/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):

• 18 additional dependencies were updated

Details:

Package	Change
github.com/envoyproxy/go-control-plane	v0.12.0 -> v0.13.0
github.com/envoyproxy/protoc-gen-validate	v1.0.4 -> v1.1.0
golang.org/x/net	v0.24.0 -> v0.28.0
golang.org/x/oauth2	v0.17.0 -> v0.22.0
golang.org/x/sync	v0.6.0 -> v0.8.0
google.golang.org/genproto/googleapis/rpc	v0.0.0-20240415180920-8c6c420018be -> v0.0.0-20241113202542-65e8d215514f
google.golang.org/grpc	v1.63.2 -> v1.67.1
google.golang.org/protobuf	v1.33.0 -> v1.35.2
github.com/cespare/xxhash/v2	v2.2.0 -> v2.3.0
github.com/cncf/xds/go	v0.0.0-20231128003011-0fa0005c9caa -> v0.0.0-20240723142845-024c85f92f20
github.com/lyft/protoc-gen-star/v2	v2.0.3 -> v2.0.4-0.20230330145011-496ad1ac90a4
github.com/prometheus/client_model	v0.5.0 -> v0.6.0
golang.org/x/crypto	v0.22.0 -> v0.26.0
golang.org/x/mod	v0.15.0 -> v0.17.0
golang.org/x/sys	v0.19.0 -> v0.24.0
golang.org/x/term	v0.19.0 -> v0.23.0
golang.org/x/text	v0.14.0 -> v0.17.0
golang.org/x/tools	v0.18.0 -> v0.21.1-0.20240508182429-e35e4ccd0d2d

[github-actions]

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