Update Mac installation instructions

- Remove specialized message for Apple Silicon.
- Use the `coursier` brew formula.

Author: mbovel

_data/setup-scala.yml

@@ -2,5 +2,5 @@ linux-x86-64: curl -fL https://github.com/coursier/coursier/releases/latest/down
 linux-arm64: curl -fL https://github.com/VirtusLab/coursier-m1/releases/latest/download/cs-aarch64-pc-linux.gz | gzip -d > cs && chmod +x cs && ./cs setup
 macOS-x86-64: curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-apple-darwin.gz | gzip -d > cs && chmod +x cs && (xattr -d com.apple.quarantine cs || true) && ./cs setup
 macOS-arm64: curl -fL https://github.com/VirtusLab/coursier-m1/releases/latest/download/cs-aarch64-apple-darwin.gz | gzip -d > cs && chmod +x cs && (xattr -d com.apple.quarantine cs || true) && ./cs setup
-macOS-brew: brew install coursier/formulas/coursier && cs setup
+macOS-brew: brew install coursier && coursier setup
 windows-link: https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-win32.zip

_overviews/getting-started/index.md

@@ -51,7 +51,7 @@ Install it on your system with the following instructions.
 {% tab macOS for=install-cs-setup-tabs %}
 Run the following command in your terminal, following the on-screen instructions:
 {% include code-snippet.html language='bash' codeSnippet=site.data.setup-scala.macOS-brew %}
-{% altDetails cs-setup-macos-nobrew  "Alternatively for Apple Silicon, or if you don't use Homebrew:" %}
+{% altDetails cs-setup-macos-nobrew  "Alternatively, if you don't use Homebrew:" %}
   On the Apple Silicon (M1, M2, …) architecture:
   {% include code-snippet.html language='bash' codeSnippet=site.data.setup-scala.macOS-arm64 %}
   Otherwise, on the x86-64 architecture: