Fix broken math object related links;

api/lovr/math/Mat4/rotate.lua

@@ -43,8 +43,8 @@ return {
     }
   },
   related = {
-    'mat4:translate',
-    'mat4:scale',
-    'mat4:identity'
+    'Mat4:translate',
+    'Mat4:scale',
+    'Mat4:identity'
   }
 }

api/lovr/math/Quat/unpack.lua

@@ -35,6 +35,6 @@ return {
     }
   },
   related = {
-    'quat:set'
+    'Quat:set'
   }
 }