Fixed typo: added colon after Output

tahirabidcode · tahirabidcode · commit 5f40673c9cfa · 2025-07-28T18:34:29.000+05:00
diff --git a/README.md b/README.md
@@ -9,7 +9,7 @@ Input:
    p, principal amount
    t, time period in years
    r, annual rate of interest
-Output
+Output:
    simple interest = p*t*r
 ```
 
