docs: upate README

Author: piquark6046

README.md

@@ -1,35 +1,8 @@
 ## jsDelivr-Purge
 
-This GitHub actions is automatic jsDelivr purging process for GitHub public repositories.
+This GitHub actions is automatic jsDelivr purging process for npm public package.
 
-If you want to purge jsDelivr cache automatically, please customize the following GitHub workflow file and add it:
+### Options
 
-```yaml
-name: 'Run jsDelivr-Purge'
-
-jobs:
-  jsdelivrpurge:
-    permissions:
-      actions: read
-      contents: read
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up NodeJS LTS
-        uses: actions/setup-node@v4
-        with:
-          node-version: 'lts/*'
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: Run jsDelivr-Purge
-        uses: List-KR/[email protected]
-```
-
-The jsDelivr-Purge supports `workflow_dispatch`, `schedule` and `push` event.
-
-It always purges `latest` and the default branch of your repo.
-
-> [!WARNING]
-> jsDelivr will add authentication data into a request header.
-> You need to pay attention to this change!
+`package` : A npm package that will be purged
+`disttag` : List of the `dist-tag` property of the npm packages. Separated by a space.