Update README.md

Author: augustdominik

README.md

@@ -5,7 +5,7 @@
 # Installation
 Using Package Manager:
   1. Open package manager
-  2. + -> Add package from git URL
+  2. Add package from git URL
   3. Paste: https://github.com/GucioDevs/SimpleMinMaxSlider.git#upm (remember the #upm at the end)
 
 # Usage