bump go version 1.25.6

Signed-off-by: Rudrakh Panigrahi <rudrakh97@gmail.com>

Author: rudrakhp

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25.3@sha256:6ea52a02734dd15e943286b048278da1e04eca196a564578d718c7720433dbbe AS build
+FROM golang:1.25.6@sha256:fc24d3881a021e7b968a4610fc024fba749f98fe5c07d4f28e6cfa14dc65a84c AS build
 WORKDIR /ratelimit
 
 ENV GOPROXY=https://proxy.golang.org

examples/xds-sotw-config-server/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25.3@sha256:6ea52a02734dd15e943286b048278da1e04eca196a564578d718c7720433dbbe AS build
+FROM golang:1.25.6@sha256:fc24d3881a021e7b968a4610fc024fba749f98fe5c07d4f28e6cfa14dc65a84c AS build
 WORKDIR /xds-server
 
 COPY . .

go.mod

@@ -1,12 +1,11 @@
 module github.com/envoyproxy/ratelimit
 
-go 1.23.9
+go 1.25.6
 
 require (
 	github.com/DataDog/datadog-go/v5 v5.5.0
 	github.com/alicebob/miniredis/v2 v2.33.0
 	github.com/bradfitz/gomemcache v0.0.0-20230905024940-24af94b03874
-	github.com/cespare/xxhash/v2 v2.3.0
 	github.com/coocood/freecache v1.2.4
 	github.com/envoyproxy/go-control-plane v0.13.4
 	github.com/envoyproxy/go-control-plane/envoy v1.32.4
@@ -47,6 +46,7 @@ require (
 	github.com/alicebob/gopher-json v0.0.0-20230218143504-906a9b012302 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cncf/xds/go v0.0.0-20250501225837-2ac532fd4443 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/envoyproxy/protoc-gen-validate v1.2.1 // indirect