Fix a typo: "Rule tuning" (#539)

abeltay · web-flow · commit daffd5f7c782 · 2021-06-30T18:25:34.000+02:00
diff --git a/README.md b/README.md
@@ -317,7 +317,7 @@ enableAllRules = true
 [rule.function-length]
     Disabled = true
 
-# Rule tunning
+# Rule tuning
 [rule.argument-limit]
     Arguments = [5]
 [rule.cyclomatic]
