chore: preparing release notes for 0.5.0

Signed-off-by: Kostis (Codefresh) <[email protected]>

Author: kostis-codefresh

RELEASE_NOTES.md

@@ -1,4 +1 @@
-This is the first release of the plugin that is also packaged as a docker container.
-Therefore the binary is available as a release artifact but also as a container image stored
-in GitHub packages. Two container images (arm64/amd64) are currently available.
-
+Added ability to define rate limits for the kubeclient configuration used by the Plugin process.