docs: update

Author: liihuu

docs/@views/api/references/chart/init.md

@@ -61,7 +61,7 @@
       threshold?: number
       format?: (value: number | string) => string
     }
-    zoomAnchor?: { main?: 'cursor_point' | 'last_bar', xAxis?: 'cursor_point' | 'last_bar' }
+    zoomAnchor?: 'cursor' | 'last_bar' | { main?: 'cursor' | 'last_bar', xAxis?: 'cursor' | 'last_bar' }
   }
 ) => Chart
 ```

docs/@views/api/samples/getZoomAnchor/index.js

@@ -16,4 +16,5 @@ chart.setDataLoader({
   }
 })
 
-const anchor = chart.zoomAnchor()
+const anchor = chart.getZoomAnchor()
+console.log(anchor)

docs/en-US/api/chart/init.md

@@ -65,7 +65,7 @@ import Tip from '../../../@components/Tip.vue'
   - `decimalFold` Decimal 0 folds the configuration.
     - `threshold` Fold threshold.
     - `format` Custom formatting method.
-  - `zoomAnchor` Set the anchor position when zooming the chart to `last_bar` or `cursor_point`
+  - `zoomAnchor` Set the anchor position when zooming the chart to `last_bar` or `cursor`
 
 ### Returns {#returns}
 `init` returns an object `Chart`。