added Scripts to PATH on Windows (#173)

Co-authored-by: Nikita Bykov <v-nibyko@microsoft.com>

src/find-python.ts

@@ -80,6 +80,10 @@ function usePyPy(
 
   core.addPath(installDir);
   core.addPath(_binDir);
+  // Starting from PyPy 7.3.1, the folder that is used for pip and anything that pip installs should be "Scripts" on Windows.
+  if (IS_WINDOWS) {
+    core.addPath(path.join(installDir, 'Scripts'));
+  }
 
   const impl = 'pypy' + majorVersion.toString();
   core.setOutput('python-version', impl);