refactor: uppercase action inputs

action.yaml

@@ -2,14 +2,14 @@ name: 'CLEANUP OLD NUGET'
 description: '清理 Nuget 沒用到的資源'
 author: 'Jeffery'
 inputs:
-  runner_token:
+  RUNNER_TOKEN:
     description: 'Gitea API token, highest priority source'
     required: false
-  keep_versions:
+  KEEP_VERSIONS:
     description: 'Number of recent package versions to keep'
     required: false
     default: '2'
-  dry_run:
+  DRY_RUN:
     description: 'When true, only print delete candidates'
     required: false
     default: 'true'
@@ -19,4 +19,4 @@ runs:
   env:
     GITEA_SERVER_URL: ${{ gitea.server_url }}
     GITEA_REPOSITORY: ${{ gitea.repository }}
-    RUNNER_TOKEN: ${{ inputs.runner_token || secrets.GITEA_TOKEN || secrets.RUNNER_TOKEN }}
+    RUNNER_TOKEN: ${{ inputs.RUNNER_TOKEN || secrets.GITEA_TOKEN || secrets.RUNNER_TOKEN }}