Fix homebrew nightly git failures (#8)

.github/workflows/tests.yml

@@ -22,8 +22,6 @@ env:
   NIGHTLY_DDEV_PR_URL: "https://nightly.link/ddev/ddev/actions/runs/2682419555/ddev-linux-amd64.zip"
   # Allow ddev get to use a github token to prevent rate limiting by tests
   DDEV_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-  # Allow `--HEAD` flag when running tests against HEAD
-  HOMEBREW_NO_INSTALL_FROM_API: 1
 
 jobs:
   tests:
@@ -41,7 +39,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - run: echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
+    - name: Set up Homebrew
+      id: set-up-homebrew
+      uses: Homebrew/actions/setup-homebrew@master
     - name: Environment setup
       run: |
         brew install bats-core mkcert