Prepare for release

Signed-off-by: cappyzawa <cappyzawa@gmail.com>

Author: cappyzawa

tests/integration/go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/fluxcd/pkg/cache v0.11.0
 	github.com/fluxcd/pkg/git v0.36.0
 	github.com/fluxcd/pkg/git/gogit v0.40.0
-	github.com/fluxcd/pkg/runtime v0.86.0
+	github.com/fluxcd/pkg/runtime v0.87.0
 	github.com/fluxcd/test-infra/tftestenv v0.0.0-20250626232827-e0ca9c3f8d7b
 	github.com/go-git/go-git/v5 v5.16.2
 	github.com/google/go-containerregistry v0.20.6