docs: avoid using yo 5.x for plugin developer (#4617)

* docs: avoid using yo 5.x for plugin developer

* Update v5 and v6

---------

Co-authored-by: Marc Bernard <59966492+mbtools@users.noreply.github.com>

website/docs/plugin-generator.md

@@ -10,7 +10,7 @@ Verdaccio is a pluggable application, with the objective to help developers to g
 To install the generator, as first step you must install the _yeoman_ command `yo`.
 
 ```bash
-npm install -g yo
+npm install -g yo@4
 ```
 
 then, install the custom generator running the following in your terminal.
@@ -19,6 +19,12 @@ then, install the custom generator running the following in your terminal.
 npm i -g generator-verdaccio-plugin
 ```
 
+:::caution
+
+`generator-verdaccio-plugin` is not compatible with yeoman version 5 yet. You must use version 4 for it to function correctly.
+
+:::
+
 ## Using the generator {#using-the-generator}
 
 Use `yeoman` is quite straighforward, you can read more information about it [here](https://yeoman.io/learning/index.html).

website/versioned_docs/version-5.x/plugin-generator.md

@@ -10,7 +10,7 @@ Verdaccio is a pluggable application, with the objective to help developers to g
 To install the generator, as first step you must install the _yeoman_ command `yo`.
 
 ```bash
-npm install -g yo
+npm install -g yo@4
 ```
 
 then, install the custom generator running the following in your terminal.
@@ -19,6 +19,12 @@ then, install the custom generator running the following in your terminal.
 npm i -g generator-verdaccio-plugin
 ```
 
+:::caution
+
+`generator-verdaccio-plugin` is not compatible with yeoman version 5 yet. You must use version 4 for it to function correctly.
+
+:::
+
 ## Using the generator {#using-the-generator}
 
 Use `yeoman` is quite straighforward, you can read more information about it [here](https://yeoman.io/learning/index.html).

website/versioned_docs/version-6.x/plugin-generator.md

@@ -10,7 +10,7 @@ Verdaccio is a pluggable application, with the objective to help developers to g
 To install the generator, as first step you must install the _yeoman_ command `yo`.
 
 ```bash
-npm install -g yo
+npm install -g yo@4
 ```
 
 then, install the custom generator running the following in your terminal.
@@ -19,6 +19,12 @@ then, install the custom generator running the following in your terminal.
 npm i -g generator-verdaccio-plugin
 ```
 
+:::caution
+
+`generator-verdaccio-plugin` is not compatible with yeoman version 5 yet. You must use version 4 for it to function correctly.
+
+:::
+
 ## Using the generator {#using-the-generator}
 
 Use `yeoman` is quite straighforward, you can read more information about it [here](https://yeoman.io/learning/index.html).