ci(ruby): don't run bundle update (#1034)

## 🧰 Changes

We're running `bundle update` in our Ruby CI before running unit tests
and this is upgrading all of our dependencies. Our usage of some of
these dependencies apparently needs some work as every Ruby unit test
fails on these updated deps.

Author: erunion

.github/workflows/ruby.yml

@@ -11,18 +11,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-node@v4
-      with:
-        node-version: 16
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 16
 
-    - run: npm ci --ignore-scripts
-    - run: make test-metrics-ruby-rails
-    - run: make test-webhooks-ruby-rails
+      - run: npm ci --ignore-scripts
+      - run: make test-metrics-ruby-rails
+      - run: make test-webhooks-ruby-rails
 
-    - name: Cleanup
-      if: always()
-      run: docker-compose down
+      - name: Cleanup
+        if: always()
+        run: docker-compose down
 
   build:
     runs-on: ubuntu-latest
@@ -55,7 +55,6 @@ jobs:
         run: |
           make install
           gem install rack ${{ matrix.rack-version }}
-          bundle update
 
       - name: Run linter
         run: make lint