docs(api): explain usage of WEBPACK_PACKAGE env var (#4871)

* docs(api): explain usage of `WEBPACK_PACKAGE` env var

* fix: typo

* docs: apply suggestions

* docs: fix

Author: snitin315

src/content/api/cli.md

@@ -521,16 +521,40 @@ NODE_OPTIONS="--max-old-space-size=4096 -r /path/to/preload/file.js" webpack
 
 ## CLI Environment Variables
 
-| Environment Variable                | Description                                                         |
-| ----------------------------------- | ------------------------------------------------------------------- |
-| `WEBPACK_CLI_SKIP_IMPORT_LOCAL`     | when `true` it will skip using the local instance of `webpack-cli`. |
-| `WEBPACK_CLI_FORCE_LOAD_ESM_CONFIG` | when `true` it will force load the ESM config.                      |
-| `WEBPACK_PACKAGE`                   | Use a custom webpack version in CLI.                                |
+| Environment Variable                  | Description                                                         |
+| ------------------------------------- | ------------------------------------------------------------------- |
+| `WEBPACK_CLI_SKIP_IMPORT_LOCAL`       | when `true` it will skip using the local instance of `webpack-cli`. |
+| `WEBPACK_CLI_FORCE_LOAD_ESM_CONFIG`   | when `true` it will force load the ESM config.                      |
+| [`WEBPACK_PACKAGE`](#webpack_package) | Use a custom webpack version in CLI.                                |
 
 ```bash
 WEBPACK_CLI_FORCE_LOAD_ESM_CONFIG=true npx webpack --config ./webpack.config.esm
 ```
 
+### WEBPACK_PACKAGE
+
+Use a custom webpack version in CLI. Considering the following content in your `package.json`:
+
+```json
+{
+  "webpack": "^4.0.0",
+  "webpack-5": "npm:webpack@^5.32.0",
+  "webpack-cli": "^4.5.0"
+}
+```
+
+To use `webpack v4.0.0`:
+
+```bash
+npx webpack
+```
+
+To use `webpack v5.32.0`:
+
+```bash
+WEBPACK_PACKAGE=webpack-5 npx webpack
+```
+
 ## ENV Environment Variables
 
 | Environment Variable | Description                                  |