use pinned browsers for ruby windows

Author: navin772

.github/workflows/ci-ruby.yml

@@ -84,7 +84,7 @@ jobs:
         --local_test_jobs 1
         --test_size_filters large
         --test_tag_filters ${{ matrix.browser }}
-        ${{ matrix.os != 'windows' && '--pin_browsers' || '' }}
+        --pin_browsers
         //rb/spec/...
 
   integration-tests-remote:
@@ -111,5 +111,5 @@ jobs:
         --local_test_jobs 1
         --test_size_filters large
         --test_tag_filters ${{ matrix.browser }}-remote
-        ${{ matrix.os != 'windows' && '--pin_browsers' || '' }}
+        --pin_browsers
         //rb/spec/...