Add upgrade warnings + breaking changes (#136)

Recommebded by bestpractices.dev

.goreleaser.yml

@@ -229,11 +229,15 @@ release:
     ## Container images ([on Docker Hub](https://hub.docker.com/r/jamesread/olivetin/tags?page=1&ordering=last_updated))
 
     - `docker pull docker.io/jamesread/olivetin:{{ .Version }}`
+    
+    ## Upgrade warnings, or breaking changes
+   
+    - No such issues between the last release and this version. 
 
     ## Useful links
 
     - [Which download do I need?](https://docs.olivetin.app/choose-package.html)
     - [Ask for help and chat with others users in the Discord community](https://discord.gg/jhYWWpNJ3v)
-   
+    
     Thanks for your interest in OliveTin!