Use component owners extension matching (#6966)

I have submitted a PR to add support for this to the component-owners
action: dyladan/component-owners#14, but we can
use my fork for now.

Author: trask

.github/component_owners.yml

@@ -1,8 +1,4 @@
 # this file is used by .github/workflows/assign-reviewers.yml
 components:
-  CHANGELOG.md:
-    - theletterf
-  docs:
-    - theletterf
-  README.md:
+  "*.md":
     - theletterf

.github/workflows/assign-reviewers.yml

@@ -12,7 +12,7 @@ jobs:
   assign-reviewers:
     runs-on: ubuntu-latest
     steps:
-      - uses: dyladan/component-owners@main
+      - uses: trask/component-owners@main
         with:
           # this repository is using this action to request doc review
           assign-owners: false