Add DuckDuckGo to web app for selection when creating a Github issue (#15198)

* Add DDG to available browsers

* Adjusted to use web template and clarified names

.github/ISSUE_TEMPLATE/browser.yml

@@ -1,4 +1,4 @@
-name: Browser Bug Report
+name: Browser Extension Bug Report
 description: File a bug report
 labels: [bug, browser]
 body:

.github/ISSUE_TEMPLATE/web.yml

@@ -1,4 +1,4 @@
-name: Web Bug Report
+name: Web App Bug Report
 description: File a bug report
 labels: [bug, web]
 body:
@@ -77,6 +77,7 @@ body:
         - Opera
         - Brave
         - Vivaldi
+        - DuckDuckGo
     validations:
       required: true
   - type: input