Add changelog record

changelog/unreleased/dep-and-go-update.md

@@ -1,7 +1,8 @@
-Change: Update Go version and dependencies
+Change: Improvements for automated documentation
 
-We updated the Go version used to build the binaries within the CI system and
-beside that in the same step we have updated all dependencies ti keep everything
-up to date.
+We have added some simple scripts that gets executed by Drone to keep moving
+documentation parts like the available labels or the available environment
+variables always up to date. No need to update the docs related to that manually
+anymore.
 
-https://github.com/promhippie/prometheus-hcloud-sd/issues/20
+https://github.com/promhippie/prometheus-hcloud-sd/pull/44