docs: add detail to docstring

Author: bordumb

scripts/releases/1_github.py

@@ -9,7 +9,7 @@
 What it does:
     1. Reads the version from [workspace.package] in Cargo.toml
     2. Checks crates.io to make sure the version has been bumped
-    3. Checks that the git tag doesn't already exist
+    3. Checks that the git tag doesn't already exist on GitHub
     4. Creates a git tag v{version} and pushes it to origin
 
 Requires: