Update 2025-05-21-testing.md

Fix image hehe

Author: thecodingchicken

_posts/2025-05-21-testing.md

@@ -4,7 +4,7 @@ Today I have some time to test, but I haven't had much time recently at all.  I'
 
 <figure>
   <div>
-  <img src="{{site.url}}assets/img/Screenshot_20250521_210250.png" alt="74hc154 pinout"/>
+  <img src="{{site.url}}/assets/img/Screenshot_20250521_210250.png" alt="74hc154 pinout"/>
   </div>
   <figcaption>{{"74hc154 pinout and truth table"| markdownify}}</figcaption>
 </figure>