chore(deps): update dependency go to v1.25.2

Author: renovate[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/nakamasato/mysql-operator
 
 go 1.24.0
 
-toolchain go1.25.1
+toolchain go1.25.2
 
 require (
 	cloud.google.com/go/secretmanager v1.15.0