deps: update golang.org/x/exp digest to f9890c6

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

Author: renovate[bot]

metrics-operator/go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/prometheus/client_model v0.5.0
 	github.com/prometheus/common v0.45.0
 	github.com/stretchr/testify v1.8.4
-	golang.org/x/exp v0.0.0-20240103183307-be819d1f06fc
+	golang.org/x/exp f9890c6ad9f3
 	golang.org/x/net v0.19.0
 	gopkg.in/inf.v0 v0.9.1
 	k8s.io/api v0.28.5