Update README.md with image resource path (#510)

The loading "images from resources" specifies that the image is placed in `resources/images` however the loading of the resource does not reflect this path.

tutorials/Image_And_Icons_Manipulations/README.md

@@ -20,7 +20,7 @@ import androidx.compose.ui.res.imageResource
 fun main() {
     Window {
         Image(
-            bitmap = imageResource("sample.png"), // ImageBitmap
+            bitmap = imageResource("images/sample.png"), // ImageBitmap
             contentDescription = "Sample",
             modifier = Modifier.fillMaxSize()
         )
@@ -391,4 +391,4 @@ fun main() {
 }
 ```
 
-![Loading XML vector images](loading_xml_vector_images.png)
+![Loading XML vector images](loading_xml_vector_images.png)
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