style: update logo border radius in README.md

Author: AbdelrhmanHamouda

README.md

@@ -3,7 +3,7 @@
        alt="Locust Kubernetes Operator Logo" 
        width="120" 
        height="120"
-       style="border-radius: 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); margin-bottom: 0.1rem;">
+       style="border-radius: 30px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); margin-bottom: 0.1rem;">
 </div>
 
 <h1 align="center" style="margin-top: 0.01rem;">Locust Kubernetes Operator</h1>