Update links to bugtracker

The new bugtracker has severely regressed discoverability, so we need to
separately include links to the bug list and the bug filing templates.

Change-Id: I583117bcacfd2622dd6db5c1d6668dc410533daa
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/69128
Reviewed-by: Bob Beck <bbe@google.com>

README.md

@@ -24,7 +24,9 @@ not part of the NDK) and a number of other apps/programs.
 Project links:
 
   * [API documentation](https://commondatastorage.googleapis.com/chromium-boringssl-docs/headers.html)
-  * [Bug tracker](https://issues.chromium.org/issues/new?component=1590116&template=2003337)
+  * [Bug tracker](https://issues.chromium.org/issues?q=status:open%20componentid:1590116&s=created_time:desc)
+    * [Filing new issues](https://issues.chromium.org/issues/new?component=1590116&template=2003314)
+    * [Filing new security issues](https://issues.chromium.org/issues/new?component=1590116&template=2003205)
   * [CI](https://ci.chromium.org/p/boringssl/g/main/console)
   * [Code review](https://boringssl-review.googlesource.com)