fix: Minor styling corrections (#419)

* Update heading level for troubleshooting instructions

* Clean up blank lines in building-source-windows-other-ide.md

en/contributors/engine/building-source-windows-other-ide.md

@@ -6,18 +6,15 @@
 3. **Clone the repository:**
    ```bash
    git lfs clone https://github.com/stride3d/stride.git
-
    ```
 4. **Build using the command line:**
    - Navigate to the `/build` directory in the command prompt and run:
    ```bash
    msbuild /t:Restore Stride.sln
-
    ```
    - Then run:
    ```bash
    compile.bat
-
    ```
 
 ## Build Stride with Rider

en/manual/troubleshooting/unable-to-resolve-stride-game-studio.md

@@ -16,7 +16,7 @@ at Stride.LauncherApp.ViewModels.PackageVersionViewModel.<>c__DisplayClass55_0.<
 
 This usually means your NuGet package sources are misconfigured.
 
-## How to fix
+### How to fix
 
 1. Locate your NuGet configuration file:
    - `C:\Users\YourUserName\AppData\Roaming\NuGet\NuGet.Config`
@@ -53,4 +53,4 @@ If the install program (Launcher) only shows Stride 3.x versions and not 4.x, yo
     ```
 4. Save the file and restart the Launcher.
 
-You should now see the latest Stride 4.x versions available for installation.
+You should now see the latest Stride 4.x versions available for installation.