chore(deps): update dependency go to v1.25.4 (#113)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -1,6 +1,6 @@
 module github.com/openmcp-project/metrics-operator
 
-go 1.25.3
+go 1.25.4
 
 require (
 	github.com/go-logr/logr v1.4.3