adjust README.md
add link to option about disable publishing
@@ -10,7 +10,7 @@ Basically it runs following tasks:
* Check if current working directory is git clean
* Read version from Cargo.toml, remove pre-release extension, bump
version and commit if necessary
-* Run `cargo publish`
+* Run `cargo publish` ([if not disabled](http://doc.crates.io/manifest.html#the-publish--field-optional))
* Generate rustdoc and push to gh-pages optionally
* Create a git tag for this version
* Bump version for next development cycle
