update README.md;

README.md

@@ -72,7 +72,7 @@ sudo apt-get install libasio-dev:arm64 libncurses-dev:arm64 libssl-dev:arm64
         dvmhost/build # make strip
         dvmhost/build # make tarball
         ```
-        2. After `make tarball` completes file named `dvmhost_R04Gxx_<arch>.tar.gz` should be created. Run the following, command to install.
+        2. After `make tarball` completes file named `dvmhost_R04Gxx_<arch>.tar.gz` should be created. Run the following command to install:
         ```
         dvmhost/build # sudo tar xvzf dvmhost_R04Gxx_<arch>.tar.gz -C /opt
         ```