fix: make required

Author: szymonrybczak

.github/actions/rnef-post-build/action.yml

@@ -10,8 +10,7 @@ inputs:
     required: true
   github-token:
     description: A GitHub Personal Access Token with write access to the project
-    required: false
-    default: ${{ github.token }}
+    required: true
 runs:
   using: 'composite'
   steps:

action.yml

@@ -8,8 +8,7 @@ branding:
 inputs:
   github-token:
     description: GitHub Token
-    required: false
-    default: ${{ github.token }}
+    required: true
   working-directory:
     description: 'Working directory for the build command'
     required: false