Update dependency go to v1.25.5

Author: renovate[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/stakater/ipshield-operator
 
 go 1.23.0
 
-toolchain go1.23.6
+toolchain go1.25.5
 
 require (
 	github.com/deckarep/golang-set/v2 v2.7.0