Clarify create_from_image() usage

doc/classes/ImageTexture.xml

@@ -42,6 +42,14 @@
  Returns the format of the texture, one of [enum Image.Format].
  </description>
  </method>
+ <method name="set_image">
+ <return type="void" />
+ <argument index="0" name="image" type="Image" />
+ <description>
+ Replaces the texture's data with a new [Image]. This will re-allocate new memory for the texture.
+ If you want to update the image, but don't need to change its paramters (format, size), use [method update] instead for better performance.
+ </description>
+ </method>
  <method name="set_size_override">
  <return type="void" />
  <argument index="0" name="size" type="Vector2" />
@@ -54,8 +62,8 @@
  <argument index="0" name="image" type="Image" />
  <description>
  Replaces the texture's data with a new [Image].
- [b]Note:[/b] The texture has to be initialized first with the [method create_from_image] method before it can be updated. The new image dimensions, format, and mipmaps configuration should match the existing texture's image configuration, otherwise it has to be re-created with the [method create_from_image] method.
- Use this method over [method create_from_image] if you need to update the texture frequently, which is faster than allocating additional memory for a new texture each time.
+ [b]Note:[/b] The texture has to be created using [method create_from_image] or initialized first with the [method set_image] method before it can be updated. The new image dimensions, format, and mipmaps configuration should match the existing texture's image configuration.
+ Use this method over [method set_image] if you need to update the texture frequently, which is faster than allocating additional memory for a new texture each time.
  </description>
  </method>
  </methods>

scene/resources/texture.cpp

@@ -323,6 +323,7 @@ void ImageTexture::_bind_methods() {
  ClassDB::bind_static_method("ImageTexture", D_METHOD("create_from_image", "image"), &ImageTexture::create_from_image);
  ClassDB::bind_method(D_METHOD("get_format"), &ImageTexture::get_format);
 
+ ClassDB::bind_method(D_METHOD("set_image", "image"), &ImageTexture::set_image);
  ClassDB::bind_method(D_METHOD("update", "image"), &ImageTexture::update);
  ClassDB::bind_method(D_METHOD("set_size_override", "size"), &ImageTexture::set_size_override);
 }