Readme: fixed broken links

README.md

@@ -297,7 +297,7 @@ This tutorial demonstrates how to use multiple command queues to perform renderi
 This tutorial demonstrates how to use variable rate shading to reduce the pixel shading load.
 
 
-## [Tutorial 25 - Render State Packager](https://github.com/DiligentGraphics/DiligentSamples/tree/tutorial25/Tutorials/Tutorial25_StatePackager)
+## [Tutorial 25 - Render State Packager](https://github.com/DiligentGraphics/DiligentSamples/tree/master/Tutorials/Tutorial25_StatePackager)
 
 ![](Tutorials/Tutorial25_StatePackager/Screenshot.jpg)
 

Tutorials/Tutorial25_StatePackager/readme.md

@@ -41,7 +41,7 @@ In this section we provide some details about the rendering process. Additional
 found on the internet. [Ray Tracing in One Weekend](https://github.com/RayTracing/raytracing.github.io/)
 and [Rendering Introduction Course from TU Wien University](https://www.cg.tuwien.ac.at/courses/Rendering/VU/2021S)
 could be good starting points.
-[Path tracing shader source code](https://github.com/DiligentGraphics/DiligentSamples/blob/master/Tutorials/Tutorial25_StatePackager/assets/path_trace.csh)
+[Path tracing shader source code](https://github.com/DiligentGraphics/DiligentSamples/blob/master/Tutorials/Tutorial25_StatePackager/assets/path_trace.psh)
 also contains a lot of additional details.
 
 The rendering process consists of the following three stages:

Tutorials/Tutorial26_StateCache/readme.md

@@ -227,7 +227,7 @@ Path tracing technique in this tutorial extends the method from Tutorial 25 and
 - Multiple importance sampling with balance heuristics
 
 Please refer to the
-[shader source code](https://github.com/DiligentGraphics/DiligentSamples/blob/master/Tutorials/Tutorial26_StateCache/assets/path_trace.csh)
+[shader source code](https://github.com/DiligentGraphics/DiligentSamples/blob/master/Tutorials/Tutorial26_StateCache/assets/path_trace.psh)
 for more details.