fix(deps): update module cloud.google.com/go/compute/metadata to v0.9.0

Author: renovate[bot]

backend/go.mod

@@ -5,7 +5,7 @@ go 1.23.0
 toolchain go1.23.6
 
 require (
-	cloud.google.com/go/compute/metadata v0.8.0
+	cloud.google.com/go/compute/metadata v0.9.0
 	cloud.google.com/go/firestore v1.18.0
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/trace v1.19.1
 	github.com/bufbuild/connect-go v1.10.0