docs: Fix "colro" typo in README (anuraghazra#441)

readme.md

@@ -140,7 +140,7 @@ You can customize the appearance of your `Stats Card` or `Repo Card` however you
 You can provide multiple comma separated values in bg_color option to render a gradient, the format of the gradient is :-
 
 ```
-&bg_color=DEG,COLOR1,COLRO2,COLOR3...COLOR10
+&bg_color=DEG,COLOR1,COLOR2,COLOR3...COLOR10
 ```
 
 > Note on cache: Repo cards have default cache of 4hours (14400 seconds) if the fork count & star count is less than 1k otherwise it's 2hours (7200). Also note that cache is clamped to a minimum of 2hours and maximum of 24hours