Update CODEOWNERS (#9229)

.github/CODEOWNERS

 # Users referenced in this file will automatically be requested as reviewers for PRs that modify the given paths.
 # See https://help.github.com/articles/about-code-owners/
 
-/.azure/ @dougbu
-/.config/ @dougbu
-/build/ @dougbu
-/eng/ @dougbu
-/src/Components/ @SteveSandersonMS
-/src/DefaultBuilder/ @tratcher @anurse
-/src/Hosting/ @tratcher @anurse
-/src/Http/ @tratcher @jkotalik @anurse
-/src/Middleware/ @tratcher @anurse
-/src/ProjectTemplates/ @ryanbrandenburg
-/src/Security/ @tratcher @anurse
-/src/Servers/ @tratcher @jkotalik @anurse
-/src/Middleware/Rewrite @jkotalik @anurse
-/src/Middleware/HttpsPolicy @jkotalik @anurse
-/src/SignalR/ @mikaelm12 @BrennanConroy @halter73 @anurse
+/.azure/                        @aspnet/build
+/.config/                       @aspnet/build
+/build/                         @aspnet/build
+/eng/                           @aspnet/build
+/src/Components/                @SteveSandersonMS
+/src/DefaultBuilder/            @tratcher @anurse
+/src/Hosting/                   @tratcher @anurse
+/src/Http/                      @tratcher @jkotalik @anurse
+/src/Middleware/                @tratcher @anurse
+/src/ProjectTemplates/          @ryanbrandenburg
+/src/Security/                  @tratcher @anurse
+/src/Servers/                   @tratcher @jkotalik @anurse
+/src/Middleware/Rewrite         @jkotalik @anurse
+/src/Middleware/HttpsPolicy     @jkotalik @anurse
+/src/SignalR/                   @mikaelm12 @BrennanConroy @halter73 @anurse