Update README.md

Author: gavofyork

README.md

@@ -15,11 +15,11 @@ sudo apt install make clang
 Then, install Polkadot PoC-1:
 
 ```
-cargo install --git https://github.com/paritytech/polkadot.git --branch v0.1.0
+cargo install --git https://github.com/paritytech/polkadot.git --branch v0.1
 ```
 
 You'll now have a `polkadot` binary installed to your `PATH`. You can drop the
-`--branch v0.1.0` to get the very latest version of Polkadot, but these
+`--branch v0.1` to get the very latest version of Polkadot, but these
 instructions might not work in that case.
 
 ### Development