Fix image links for documentation on Unity website (#150)

Packages/com.unity.renderstreaming/Documentation~/index.md

@@ -14,59 +14,52 @@ Currently, there is one sample:
 1.  Open an existing or create a new project
 2.  Click on the `Window` Menu and open `Package Manager`. Then, click on `Advanced` and make sure `Show preview packages` is checked
 
-<img src="./images/show_preview_packages.png" width=480 align=center>
+	<img src="./images/show_preview_packages.png" width="480">
 
 3.  Make sure to search `All packages`, and type `RenderStreaming` in the text box.
 
-<img src="./images/render_streaming_package.png" width=480 align=center>
+	<img src="./images/render_streaming_package.png" width="480">
 
 4. Click `Install` on the bottom right.
 
 5. If an input system dialog box appears, click `Yes`
 
-<img src="./images/input_system_backend.png" width=360 align=center>
+	<img src="./images/input_system_backend.png" width="360">
 
 6. Click on `Import in project` to import the HDRP sample.
    This will also automatically install the HDRP package *(com.unity.render-pipelines.high-definition)*.
 
-<img src="./images/hdrp_sample.png" width=480 align=center>
+	<img src="./images/hdrp_sample.png" width="480" >
 
 7. When this `Import Unity Package` dialog box appears, click `Import` to import all assets.
 
-<img src="./images/hdrp_unitypackage.png" width=240 align=center>
+	<img src="./images/hdrp_unitypackage.png" width="240" >
 
 8. After all the import process has been finished, open `Assets/SimpleScene` in the Project View.
 
-<img src="./images/simplescene.png" width=240 align=center>
+	<img src="./images/simplescene.png" width="240" >
 
 9. Click on `Edit/Render Streaming/Download web app` menu item to download our web server
 
-<img src="./images/download_webapp.png" width=300 align=center>
+	<img src="./images/download_webapp.png" width="300" >
 
 10. When the select download folder window appears, click on `Select Folder` to download the file to the default folder
 
-<img src="./images/select_download_folder.png" width=240 align=center>
+	<img src="./images/select_download_folder.png" width="240" >
 
 
 11. After the download is finished and a new explorer window is opened, click on `webserver.exe` to start 
 Unity RenderStreaming web server.
 
-<img src="./images/webserver.png" width=240 align=center>
+	<img src="./images/webserver.png" width="240">
 
 12. Enter play mode in Unity
 
-<img src="./images/play_mode.png" width=240 align=center>
+	<img src="./images/play_mode.png" width="240">
 
 13. Open your browser and type `localhost` on the URL bar. Then click on the play button in the middle. 
 The view in Unity should then appear on your browser.
 
-<img src="./images/browser.png" width=240 align=center>
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+	<img src="./images/browser.png" width="240">