Change section title to include rocket emoji

Updated section title for Hohmann Transfer simulations.

Author: devNull-bootloader

README.md

@@ -19,7 +19,8 @@ Simulates a planet orbiting a star using Newton's law of universal gravitation.
 
 > 🔧 *Update: support for multiple planets and variable initial speeds!*
 
-### 🌍 Hohmann Transfer Simulations and Delta-V Calculations
+
+### 🚀 Hohmann Transfer Simulations and Delta-V Calculations
 **Status:** Done 
 Simulates a probe performing a Hohmann Transfer using the Vis-Viva equation. Graphs show "Speed vs. Time" and other relations.