Bug 1594673 - Actually disable RTCDataChannel-send on win32; r=ng

I messed up the syntax the first time around, this actually disables
the test. This was exacerbated by accidentally testing the changes on
win32-opt rather than win32-shippable-opt where the intermittent
occurs.

Differential Revision: https://phabricator.services.mozilla.com/D52239

--HG--
extra : moz-landing-system : lando

testing/web-platform/meta/webrtc/RTCDataChannel-send.html.ini

@@ -1,6 +1,6 @@
 [RTCDataChannel-send.html]
   disabled:
-    if os == "windows" and bits == '32': https://bugzilla.mozilla.org/show_bug.cgi?id=1594018
+    if os == "win" and bits == 32: https://bugzilla.mozilla.org/show_bug.cgi?id=1594018
 
   [Calling send() up to max size should succeed, above max size should fail]
     expected: FAIL