ReadMe Fixes (#2083)

* Add copy code buttons to github clone commands (#1928)

* Add copy code buttons to github clone commands

* Add language specifier

* build -> built (#1925)

* Update clone command

Author: stefankiesz

README.md

@@ -57,17 +57,21 @@ Please refer to the release notes in [Releases](https://github.com/awslabs/amazo
 ### Download
 To download run the following command:
 
-`git clone --recursive https://github.com/awslabs/amazon-kinesis-video-streams-webrtc-sdk-c.git`
+```shell
+git clone https://github.com/awslabs/amazon-kinesis-video-streams-webrtc-sdk-c.git --single-branch -b main kvs-webrtc-sdk
+```
 
 You will also need to install `pkg-config` and `CMake` and a build environment
 
 ### Configuring on Ubuntu / Unix
 
 Create a build directory in the newly checked out repository, and execute CMake from it.
 
-`mkdir -p amazon-kinesis-video-streams-webrtc-sdk-c/build; cd amazon-kinesis-video-streams-webrtc-sdk-c/build; cmake .. `
+```shell
+mkdir -p amazon-kinesis-video-streams-webrtc-sdk-c/build; cd amazon-kinesis-video-streams-webrtc-sdk-c/build; cmake ..
+```
 
-We have provided an example of using GStreamer to capture/encode video, and then send via this library. This is only build if `pkg-config` finds
+We have provided an example of using GStreamer to capture/encode video, and then send via this library. This is only built if `pkg-config` finds
 GStreamer is installed on your system.
 
 On Ubuntu and Raspberry Pi OS you can get the libraries by running