Bug 1692056 [wpt PR 27582] - Include print reftests in the `./wpt tests-affected` logic, a=testonly

Automatic update from web-platform-tests
Include print reftests in the `./wpt tests-affected` logic

--

wpt-commits: 35c43e0c51326c7f60a2623362720b46783675c0
wpt-pr: 27582

testing/web-platform/tests/tools/wpt/testfiles.py

@@ -251,7 +251,7 @@ def affected_testfiles(files_changed,  # type: Iterable[Text]
     nontests_changed = set(files_changed)
     wpt_manifest = load_manifest(manifest_path, manifest_update)
 
-    test_types = ["crashtest", "testharness", "reftest", "wdspec"]
+    test_types = ["crashtest", "print-reftest", "reftest", "testharness", "wdspec"]
     support_files = {os.path.join(wpt_root, path)
                      for _, path, _ in wpt_manifest.itertypes("support")}
     wdspec_test_files = {os.path.join(wpt_root, path)