build: update public-api approvers (angular#60328)

Adds myself and Paul to the public API reviewers to help with the reviews.

PR Close angular#60328

Author: crisbeto

.pullapprove.yml

@@ -394,6 +394,8 @@ groups:
         - pkozlowski-opensource
         - kirjs
         - mmalerba
+        - crisbeto
+        - devversion
         - ~iteriani
         - ~tbondwilkinson
         - ~rahatarmanahmed