chore: update actions to tap before attempting to install

Author: arenault-dashlane

.github/workflows/test-formula.yml

@@ -26,7 +26,9 @@ jobs:
                   echo /home/linuxbrew/.linuxbrew/bin >> $GITHUB_PATH
 
             - name: Install Dashlane CLI from rb file
-              run: brew install --build-from-source Formula/dashlane-cli.rb
+              run: |
+                 brew tap dashlane/tap
+                 brew install --build-from-source Formula/dashlane-cli.rb
 
             - name: Run brew tests
               run: brew test Formula/dashlane-cli.rb