Update metadata

Author: andy5995

README.md

@@ -1,6 +1,6 @@
 # linuxdeplay-build-helper
 
-An action that aims to help building an
+An action that aims to help build an
 [AppImage](https://github.com/AppImage/AppImageKit) using
 [linuxdeploy](https://github.com/linuxdeploy/linuxdeploy).
 

action.yml

@@ -1,4 +1,5 @@
 name: 'LinuxDeploy Action'
+description: 'An action that aims to help build an AppImage using linuxdeploy'
 
 inputs:
   platform:
@@ -81,3 +82,6 @@ runs:
       run: |
         echo "IMAGE_FILENAME=$(basename `find out/*.AppImage`)" >> $GITHUB_ENV
 
+branding:
+  icon: package
+  color: gray-dark