chore(deps): update dependency go to v1.25.3

Ref: PACT-445

Author: pactflow-renovate-bot[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/pactflow/example-provider-golang
 
 go 1.23.0
 
-toolchain go1.25.2
+toolchain go1.25.3
 
 require (
 	github.com/gin-gonic/gin v1.11.0