Add ERB Helper Tags extension since it was removed from ruby-lsp (#492)

Author: ajdubovoy

_partials/cn/vscode_extensions.md

@@ -16,6 +16,7 @@ code --install-extension Rubymaniac.vscode-paste-and-indent
 code --install-extension alexcvzz.vscode-sqlite
 code --install-extension anteprimorac.html-end-tag-labels
 code --install-extension marcoroth.herb-lsp
+code --install-extension rayhanw.erb-helpers
 ```
 
 你安装的就是下面这些插件：

_partials/es/vscode_extensions.md

@@ -17,6 +17,7 @@ code --install-extension Rubymaniac.vscode-paste-and-indent
 code --install-extension alexcvzz.vscode-sqlite
 code --install-extension anteprimorac.html-end-tag-labels
 code --install-extension marcoroth.herb-lsp
+code --install-extension rayhanw.erb-helpers
 ```
 
 Aquí está la lista de las extensiones que estás instalando:

_partials/fr/vscode_extensions.md

@@ -16,6 +16,7 @@ code --install-extension Rubymaniac.vscode-paste-and-indent
 code --install-extension alexcvzz.vscode-sqlite
 code --install-extension anteprimorac.html-end-tag-labels
 code --install-extension marcoroth.herb-lsp
+code --install-extension rayhanw.erb-helpers
 ```
 
 Voici la liste des extensions que tu es en train d'installer :

_partials/pt/vscode_extensions.md

@@ -17,6 +17,7 @@ code --install-extension Rubymaniac.vscode-paste-and-indent
 code --install-extension alexcvzz.vscode-sqlite
 code --install-extension anteprimorac.html-end-tag-labels
 code --install-extension marcoroth.herb-lsp
+code --install-extension rayhanw.erb-helpers
 ```
 
 Aqui está uma lista das extensões que você está instalando:

_partials/vscode_extensions.md

@@ -16,6 +16,7 @@ code --install-extension dbaeumer.vscode-eslint
 code --install-extension Rubymaniac.vscode-paste-and-indent
 code --install-extension alexcvzz.vscode-sqlite
 code --install-extension anteprimorac.html-end-tag-labels
+code --install-extension rayhanw.erb-helpers
 ```
 
 Here is a list of the extensions you are installing: