fix: typos (#4202)

Co-authored-by: Bart Louwers <bart@emeel.net>

shaders/debug.vertex.glsl

@@ -12,7 +12,7 @@ layout (std140) uniform DebugUBO {
 
 void main() {
     // This vertex shader expects a EXTENT x EXTENT quad,
-    // The UV co-ordinates for the overlay texture can be calculated using that knowledge
+    // The UV coordinates for the overlay texture can be calculated using that knowledge
     v_uv = a_pos / 8192.0;
     gl_Position = u_matrix * vec4(a_pos * u_overlay_scale, 0, 1);
 }