Update Github issue templates

@@ -32,6 +32,8 @@ Code snippet to reproduce the behavior:
  - [ ] iOS
  - [ ] Android
  - [ ] Browser
+ - [ ] Windows
+ - [ ] Linux
 
 **Smartphone (please complete the following information):**
  - Device: [e.g. iPhone6]

@@ -12,10 +12,10 @@ assignees: ''
 
      If you can't find the answer there, please consider asking a question on
      the Stack Overflow Web site:
-      * https://stackoverflow.com/questions/ask?tags=dart-pdf
+      * https://stackoverflow.com/questions/ask?title=%5Bdart-pdf%5D%20
 
      You can browse existing questions at this address:
-      * https://stackoverflow.com/questions/tagged/dart-pdf?sort=frequent
+      * https://stackoverflow.com/search?q=dart-pdf&sort=frequent
 
      Please don't file a GitHub issue for support requests. GitHub issues are
      for tracking defects in the product. If you file a bug asking for help, we