Correct version regex in Makefile, add git as dependency

README.md

@@ -60,7 +60,7 @@ For the impatient here's the gist of it for Ubuntu and Debian:
     sudo apt-get install -y \
       autoconf automake build-essential git libtool libgmp-dev \
       libsqlite3-dev python python3 net-tools zlib1g-dev libsodium-dev \
-      python3-mako
+      python3-mako git
     git clone https://github.com/ElementsProject/lightning.git
     cd lightning
     ./configure