Fix typo in documentation

docs/includes/pairlists.md

@@ -167,7 +167,7 @@ If the trading range over the last 10 days is <1%, remove the pair from the whit
 
 #### VolatilityFilter
 
-Volatility is the degree of historical variation of a pairs over time, is is measured by the standard deviation of logarithmic daily returns. Returns are assumed to be normally distributed, although actual distribution might be different. In a normal distribution, 68% of observations fall within one standard deviation and 95% of observations fall within two standard deviations. Assuming a volatilty of 0.05 means that the expected returns for 20 out of 30 days is expected to be less than 5% (one standard deviation). Volatility is a positive ratio of the expected deviation of return and can be greater than 1.00. Please refer to the wikipedia definition of [`volatility`](https://en.wikipedia.org/wiki/Volatility_(finance)).
+Volatility is the degree of historical variation of a pairs over time, is is measured by the standard deviation of logarithmic daily returns. Returns are assumed to be normally distributed, although actual distribution might be different. In a normal distribution, 68% of observations fall within one standard deviation and 95% of observations fall within two standard deviations. Assuming a volatility of 0.05 means that the expected returns for 20 out of 30 days is expected to be less than 5% (one standard deviation). Volatility is a positive ratio of the expected deviation of return and can be greater than 1.00. Please refer to the wikipedia definition of [`volatility`](https://en.wikipedia.org/wiki/Volatility_(finance)).
 
 This filter removes pairs if the average volatility over a `lookback_days` days is below `min_volatility` or above `max_volatility`. Since this is a filter that requires additional data, the results are cached for `refresh_period`.
 
@@ -216,8 +216,8 @@ The below example blacklists `BNB/BTC`, uses `VolumePairList` with `20` assets,
     {
         "method": "VolatilityFilter",
         "lookback_days": 10,
-        "min_volatilty": 0.20,
-        "max_volatilty": 0.30,
+        "min_volatility": 0.05,
+        "max_volatility": 0.50,
         "refresh_period": 86400
     },
     {"method": "ShuffleFilter", "seed": 42}