fixed broken link (#226)

Signed-off-by: Nir Rozenbaum <[email protected]>

Author: nirrozenbaum

docs/create_new_filter.md

@@ -7,7 +7,7 @@ This tutorial outlines the steps needed for creating and hooking a new filter
 
 The tutorial demonstrates the coding of a new filter, which selects inference
  serving Pods based on their labels. All relevant code is contained in the
- [`by_labels.go`](https://github.com/llm-d/llm-d-inference-scheduler/blob/main/pkg/plugins/filter/by_labels.go) file.
+ [`by_label_selector.go`](https://github.com/llm-d/llm-d-inference-scheduler/blob/main/pkg/plugins/filter/by_label_selector.go) file.
 
 ## Introduction to filtering