Merge pull request #774 from skittlesvampir/patch-1

Update Docker-Compose Version in install.md

docs/install.md

@@ -277,7 +277,7 @@ docker run \
 
 Using docker-compose with non-root user and healthchecks enabled:
 ```yaml
-version: "2.1"
+version: "2.3"
 
 services:
   ntfy: