fix: minor grammar correction (#29999)

Signed-off-by: Saikat Dey <saikatdey2100@gmail.com>

docs/api/en/loaders/Loader.html

@@ -63,7 +63,7 @@
 
 		<h3>[method:undefined load]()</h3>
 		<p>
-			This method needs to be implement by all concrete loaders. It holds the
+			This method needs to be implemented by all concrete loaders. It holds the
 			logic for loading the asset from the backend.
 		</p>
 
@@ -92,7 +92,7 @@
 
 		<h3>[method:undefined parse]()</h3>
 		<p>
-			This method needs to be implement by all concrete loaders. It holds the
+			This method needs to be implemented by all concrete loaders. It holds the
 			logic for parsing the asset into three.js entities.
 		</p>