unify the language identifiers of the code blocks for installation commands to 'shell'

ghaaj · web-flow · commit 42300f688b32 · 2024-09-27T22:06:28.000+09:00
diff --git a/de/README.md b/de/README.md
@@ -40,7 +40,7 @@ $ brew install nushell
 
 #### Windows:
 
-```powershell
+```sh
 $ winget install nushell
 ```
 
diff --git a/es/README.md b/es/README.md
@@ -37,12 +37,12 @@ $ brew install nushell
 
 En [Scoop](https://scoop.sh):
 
-```powershell
+```sh
 $ scoop install nu
 ```
 
 #### Inicia la shell
 
-```
+```sh
 $ nu
 ```
diff --git a/ja/README.md b/ja/README.md
@@ -40,7 +40,7 @@ $ brew install nushell
 
 #### Windows:
 
-```powershell
+```sh
 $ winget install nushell
 ```
 
diff --git a/pt-BR/README.md b/pt-BR/README.md
@@ -37,12 +37,12 @@ $ brew install nushell
 
 Com [Scoop](https://scoop.sh):
 
-```powershell
+```sh
 $ scoop install nu
 ```
 
 #### Inicializar o shell
 
-```
+```sh
 $ nu
 ```
