Update github.com/nginx/agent/v3 digest to 906b54a

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

Author: renovate[bot]

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/go-logr/logr v1.4.2
 	github.com/google/go-cmp v0.7.0
 	github.com/google/uuid v1.6.0
-	github.com/nginx/agent/v3 v3.0.0-20250513105855-e745a3236e0f
+	github.com/nginx/agent/v3 906b54aa5291
 	github.com/nginx/telemetry-exporter v0.1.4
 	github.com/onsi/ginkgo/v2 v2.23.4
 	github.com/onsi/gomega v1.37.0