README: fix install instructions for latest Go versions

leonklingele · leonklingele · commit 9c9eda69c58b · 2024-01-23T01:54:15.000+01:00
diff --git a/README.md b/README.md
@@ -3,7 +3,7 @@
 ## Installation
 
 ```sh
-go get -u github.com/leonklingele/grouper/...
+go install github.com/leonklingele/grouper@latest
 grouper -help
 ```
 
