Update README.md

Author: Unitech

README.md

@@ -3,10 +3,12 @@
 <picture>
   <source
     srcset="https://raw.githubusercontent.com/Unitech/pm2/master/pres/pm2-v4.png"
+    width=710px
     media="(prefers-color-scheme: light)"
   />
   <source
     srcset="https://raw.githubusercontent.com/Unitech/pm2/development/pres/pm2-v4-dark-mode.png"
+    width=710px
     media="(prefers-color-scheme: dark), (prefers-color-scheme: no-preference)"
   />
   <img src="https://raw.githubusercontent.com/Unitech/pm2/master/pres/pm2-v4.png" />