Pins Homebrew setup action

Resolves a zizmor finding

Author: colindean

.github/workflows/make-based-ci.yml

@@ -45,7 +45,7 @@ jobs:
 
     - name: Set up Homebrew
       id: set-up-homebrew
-      uses: Homebrew/actions/setup-homebrew@master
+      uses: Homebrew/actions/setup-homebrew@7f6df1cd36597249cbf9810ff3aeff47edf8243b
 
     - name: Add Poetry and pyenv setup
       run: |