Use the new deployment true config setting

Author: scottjacobsen

README.md

@@ -128,7 +128,9 @@ You can cache the installed gems with these two steps:
         restore-keys: |
           bundle-use-ruby-${{ matrix.os }}-${{ matrix.ruby }}-
     - name: bundle install
-      run: bundle install --deployment --jobs 4
+      run: |
+        bundle config deployment true
+        bundle install --jobs 4
 ```
 
 When using a single OS, replace `${{ matrix.os }}` with the OS.