Fixing typos and adding more details

docs/vkrt_tuto_further.md.html

@@ -91,7 +91,7 @@ Replacing if/else by callable shaders. The code to execute the lighting is done
 
 ## [Ray Query](vkrt_tuto_rayquery.md.htm)
 
-Inkoking ray interestion queries directly from the fragment shader to cast shadow rays.
+Invoking ray intersection queries directly from the fragment shader to cast shadow rays.
 
 * Ray tracing directly from the fragment shader