Update dependency go to v1.25.4

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

go.mod

@@ -2,7 +2,7 @@ module github.com/app-sre/vault-manager
 
 go 1.24.0
 
-toolchain go1.24.6
+toolchain go1.25.4
 
 require (
 	github.com/hashicorp/go-version v1.7.0