docs: update csp usage docs

Author: Justineo

CHANGELOG.md

@@ -10,6 +10,7 @@
 * Dropped support for Vue < 2.7.
 * Dropped CJS outputs.
 * Dropped extra wrapper element so that you should no longer set `padding` on the component root.
+* For strict CSP usage, `vue-echarts/csp` should now be used as the entry point and `vue-echarts/csp/style.css` should be included manually.
 
 ## 6.7.3
 

README.md

@@ -459,7 +459,7 @@ Static methods can be accessed from [`echarts` itself](https://echarts.apache.or
 
 ## CSP: `style-src` or `style-src-elem`
 
-If you are applying a CSP to prevent inline `<style>` injection, you need to use files from `dist/csp` directory and include `dist/csp/style.css` into your app manually.
+If you are applying a CSP to prevent inline `<style>` injection, you need to use `vue-echarts/csp` instead of `vue-echarts` and include `vue-echarts/csp/style.css` manually.
 
 ## Migration to v6
 

README.zh-Hans.md

@@ -461,7 +461,7 @@ import { THEME_KEY } from 'vue-echarts'
 
 ## CSP: `style-src` 或 `style-src-elem`
 
-如果你正在应用 CSP 来防止内联 `<style>` 注入，则需要使用 `dist/csp` 目录中的文件，并手动引入 `dist/csp/style.css`。
+如果你正在应用 CSP 来防止内联 `<style>` 注入，则需要使用 `vue-echarts/csp` 代替 `vue-echarts`，并手动引入 `vue-echarts/csp/style.css`。
 
 ## 迁移到 v6