fix(security): rendering mutable remote content from branch head (#639)

The app fetches Markdown from `.../master/README.md`, which is a mutable branch reference. Content can change at any time and is immediately rendered client-side. This increases risk of unexpected content/script injection and makes output non-reproducible.

Affected files: index.html

Signed-off-by: tomaioo <203048277+tomaioo@users.noreply.github.com>

index.html

@@ -51,7 +51,7 @@
 		marked.use( markedGfmHeadingId.gfmHeadingId() );
 
 		// Get the markdown file, convert it to HTML & put it inside the main tag
-		fetch( 'https://raw.githubusercontent.com/offa/android-foss/master/README.md' )
+		fetch( 'README.md' )
 			.then( response => response.text() )
 			.then( data => {
 				document.querySelector( 'main' ).innerHTML = marked.parse( data );