fix(doc): Correct typo

Documentation/how-to-build.rst

@@ -71,7 +71,7 @@ Dependencies
         brew install ninja
         pip3 install --user meson  # see https://mesonbuild.com/Getting-meson.html - you will have to add ~/.local/bin to your PATH.
 
-* One of three CRC packages are required. Pick one:
+* One of two CRC packages is required. Pick one:
 
   - Ubuntu / Debian / macOS