fix incorrect fvm spawn example

the command should be fvm spawn x.x.x build not fvm spawn x.x.x flutter build

docs/pages/documentation/guides/basic-commands.mdx

@@ -268,14 +268,14 @@ This command is particularly useful when you need to run a Flutter command (such
 To build your Flutter project using version `2.5.0` of the Flutter SDK:
 
 ```bash
-fvm spawn 2.5.0 flutter build
+fvm spawn 2.5.0 build
 ```
 
 **Running Tests with a Different SDK Version**:  
 If you need to run tests using a particular Flutter SDK version:
 
 ```bash
-fvm spawn 2.2.3 flutter test
+fvm spawn 2.2.3 test
 ```
 
 ## Exec
@@ -359,4 +359,4 @@ If you need to run tests using the Flutter SDK version associated with the `stag
 
 ```bash
 > fvm flavor staging flutter test
-```
+```