fix hyperlink error

_posts/graphics-game/labs/2024-05-13-games202-shadow.md

@@ -58,7 +58,7 @@ The quality of image increased as samples per pixel (SPP) increased, at the expe
 ![](cmp-spp.png){: w="600px"}
 _Comparison of different Sample Numbers_
 
-<p style="color: gray;">see <a href="{{site.base_url}}/assets/img/post/2024-05-13-shadow/sample_number">[folder]</a> for original pictures</p>
+<p style="color: gray;">see <a href="https://github.com/livia23k/livia23k.github.io/tree/main/assets/img/post/2024-05-13-shadow/sample_number">[folder]</a> for original pictures</p>
 
 
 #### Sampling Methods
@@ -68,15 +68,15 @@ In this lab, we are provided with 2 sampling methods, the [Uniform Disk Sampling
 ![](cmp-sm.png){: w="800px"}
 _Comparison of different Sampling Methods, with 100 sample points_
 
-<p style="color: gray;">see <a href="{{site.base_url}}/assets/img/post/2024-05-13-shadow/sample_method">[folder]</a> for original pictures</p>
+<p style="color: gray;">see <a href="https://github.com/livia23k/livia23k.github.io/tree/main/assets/img/post/2024-05-13-shadow/sample_method">[folder]</a> for original pictures</p>
 
 
 #### Bias for Avoiding Self-Occlussion and Light Leaks
 
 ![](cmp-bias.png){: w="600px"}
 _Comparison of different Shadowing Bias_
 
-<p style="color: gray;">see <a href="{{site.base_url}}/assets/img/post/2024-05-13-shadow/bias">[folder]</a> for original pictures</p>
+<p style="color: gray;">see <a href="https://github.com/livia23k/livia23k.github.io/tree/main/assets/img/post/2024-05-13-shadow/bias">[folder]</a> for original pictures</p>
 
 
 ## Acknowledgement