fix(action-config): prepare for release to marketplace (actions#10)

https://github.com/marketplace/actions/github-app-token is taken, hence
the rename

---------

Co-authored-by: Parker Brown <17183625+parkerbxyz@users.noreply.github.com>

action.yml

@@ -1,17 +1,20 @@
-name: 'github-app-token'
-description: ''
-author: 'Gregor Martynus and Parker Brown'
+name: "Create GitHub App Token"
+description: "GitHub Action for creating a GitHub App installation access token"
+author: "Gregor Martynus and Parker Brown"
+branding:
+  icon: "lock"
+  color: "gray-dark"
 inputs:
   app_id:
-    description: 'GitHub app ID'
+    description: "GitHub App ID"
     required: true
   private_key:
-    description: 'GitHub app private key'
+    description: "GitHub App private key"
     required: true
 outputs:
   token:
-    description: 'GitHub installation access token'
+    description: "GitHub installation access token"
 runs:
-  using: 'node16'
-  main: 'dist/main.cjs'
-  post: 'dist/post.cjs'
+  using: "node16"
+  main: "dist/main.cjs"
+  post: "dist/post.cjs"