Remove the matching on `Owa` in env for OWA

This triggered false positive  on the [Google Play
store](https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms&hl=en)

src/apps.json

@@ -5593,7 +5593,7 @@
 			"cats": [
 				30
 			],
-			"env": "^(?:(?:g_f)?Owa|IsOwaPremiumBrowser)$",
+			"env": "^(?:(?:g_f)?IsOwaPremiumBrowser)$",
 			"html": "<link\\s[^>]*href=\"[^\"]*?([\\d.]+)/themes/resources/owafont\\.css\\;version:\\1",
 			"icon": "Outlook Web App.png",
 			"implies": "Microsoft ASP.NET",