feat(apikeys): promote to GA (#7640)

Release-As: 1.0.0
diff --git a/apikeys/CHANGES.md b/apikeys/CHANGES.md
index 78c49b6..1d4822f 100644
--- a/apikeys/CHANGES.md
+++ b/apikeys/CHANGES.md
@@ -1,5 +1,6 @@
 # Changelog
 
+
 ## [0.6.0](https://github.com/googleapis/google-cloud-go/compare/apikeys/v0.5.0...apikeys/v0.6.0) (2023-03-15)