build(deps): bump golang.org/x/net from 0.37.0 to 0.38.0 (#8125)

Bumps https://github.com/golang/net from 0.37.0 to 0.38.0. This
resolves a minor vulnerability that does not directly affect Boulder.

Changelog: golang/net@v0.37.0...v0.38.0

Author: dependabot[bot]

go.mod

@@ -37,7 +37,7 @@ require (
 	go.opentelemetry.io/otel/sdk v1.30.0
 	go.opentelemetry.io/otel/trace v1.30.0
 	golang.org/x/crypto v0.36.0
-	golang.org/x/net v0.37.0
+	golang.org/x/net v0.38.0
 	golang.org/x/sync v0.12.0
 	golang.org/x/term v0.30.0
 	golang.org/x/text v0.23.0

go.sum

@@ -343,8 +343,9 @@ golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
 golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
-golang.org/x/net v0.37.0 h1:1zLorHbz+LYj7MQlSf1+2tPIIgibq2eL5xkrGk6f+2c=
 golang.org/x/net v0.37.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
+golang.org/x/net v0.38.0 h1:vRMAPTMaeGqVhG5QyLJHqNDwecKTomGeqbnfZyKlBI8=
+golang.org/x/net v0.38.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.6.0/go.mod h1:ycmewcwgD4Rpr3eZJLSB4Kyyljb3qDh40vJ8STE5HKw=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=

vendor/golang.org/x/net/http2/frame.go

@@ -375,7 +375,7 @@ golang.org/x/crypto/ocsp
 # golang.org/x/mod v0.18.0
 ## explicit; go 1.18
 golang.org/x/mod/semver
-# golang.org/x/net v0.37.0
+# golang.org/x/net v0.38.0
 ## explicit; go 1.23.0
 golang.org/x/net/bpf
 golang.org/x/net/context/ctxhttp