feat(go): update go to 1.25.4 (#44)

* feat(go): update go to 1.25.4

Signed-off-by: Magnus Ullberg <magnus@ullberg.us>

Author: renovate[bot]

.github/workflows/lint.yml

@@ -21,5 +21,3 @@ jobs:
 
       - name: Run linter
         uses: golangci/golangci-lint-action@v9
-        with:
-          version: v2.1.0

go.mod

@@ -2,7 +2,7 @@ module object-lease-controller
 
 go 1.24.0
 
-toolchain go1.24.6
+toolchain go1.25.4
 
 require (
 	github.com/go-logr/logr v1.4.3