ci: removes bundler cache, it sucks (#4)

Author: bougyman

.github/workflows/main.yaml

@@ -21,7 +21,7 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
-          bundler-cache: true
+          bundler-cache: false
 
       - name: Install dependencies
         run: bundle install --jobs 4 --retry 3