Improve image alignment in EPFC section

Updated image formatting for the cart with spring.

Author: MRGilak

README.md

@@ -50,13 +50,19 @@ A considerably smaller step size (compared to control sample time) should be con
 
 ## EPFC
 An extended PFC controller is implemented to control a nonlinear system. The exemplar system considered is a cart with a nonlinear spring attached to it, as shown in the image:
-<img width="500" height="400" alt="cart-with-spring" src="https://github.com/user-attachments/assets/05ea10e7-072e-4275-8c02-80a70bdfcb7c" />
-
+<div align="left">
+  <img
+    width="500"
+    height="400"
+    alt="cart-with-spring"
+    src="https://github.com/user-attachments/assets/05ea10e7-072e-4275-8c02-80a70bdfcb7c"
+  />
+</div>
 
 The system state space representation is as follows:
 
 $$
-    \dot{x}_1 = x_2
+    \dot{x}_1 = x_2 \\
     \dot{x}_2 = -0.33 e^{-x_1} x_1 - 1.1 x_2 + u
     y = x_1
 $$