clarified in README.md about musl compatible compiler (#2175)

* clarified in README.md that a musl compatible compiler can be used

* removed unneeded info from README.md

removed unneeded info from README.md

* minor grammar change

minor grammar change

README.md

@@ -77,7 +77,7 @@ OBS, Streamlabs, Restream and many others have been used with Owncast. [Read mor
 ## Building from Source
 
 1. Ensure you have pre-requisites installed.
-    - [gcc compiler](https://gcc.gnu.org/install/download.html)
+    - C compiler, such as [GCC compiler](https://gcc.gnu.org/install/download.html) or a [Musl-compatible compiler](https://musl.libc.org/)
     - [ffmpeg](https://ffmpeg.org/download.html)
 1. Install the [Go toolchain](https://golang.org/dl/) (1.16 or above).
 1. Clone the repo. `git clone https://github.com/owncast/owncast`