test: exclude tests for Ruby 2.3 and 2.4 on Windows

* The test fails due to low accuracy of the timer.
* see https://bugs.ruby-lang.org/issues/13732

Author: kenichiice

.github/workflows/test.yml

@@ -14,6 +14,10 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
         ruby: [head, 2.7, 2.6, 2.5, 2.4, 2.3, jruby, truffleruby]
         exclude:
+          - os: windows-latest
+            ruby: 2.4
+          - os: windows-latest
+            ruby: 2.3
           - os: windows-latest
             ruby: truffleruby
     runs-on: ${{ matrix.os }}