refactor: rename keep versions input

README.md

@@ -24,7 +24,7 @@ Action 會依序嘗試以下來源：
 | 名稱 | 類型 | 預設值 | 說明 |
 | --- | --- | --- | --- |
 | `RUNNER_TOKEN` | string | - | Gitea API token，優先順序最高 |
-| `KEEP_VERSIONS` | integer string | `2` | 每個套件要保留的最新版本數，必須是整數且 `>= 0` |
+| `KEEP_COUNT` | integer string | `2` | 每個套件要保留的最新版本數，必須是整數且 `>= 0` |
 
 ## Log 行為
 
@@ -32,7 +32,7 @@ Action 會依序嘗試以下來源：
 
 - `Trying token from ...`
 - `Using token from ...`
-- `keep_versions=...`
+- `keep_count=...`
 - `GET /api/v1/... -> 200 OK`
 - `Candidate to delete: ...`
 - `Deleted package ... -> 204 No Content`
@@ -48,7 +48,7 @@ jobs:
       - uses: ./
         with:
           RUNNER_TOKEN: ${{ secrets.GITEA_TOKEN }}
-          KEEP_VERSIONS: 2
+          KEEP_COUNT: 2
 ```
 
 ## 測試