Correct the name of enum ButtonSize in buttons.mdx (#1147)

Author: dgaszewski

docs/docs/05-components/buttons.mdx

@@ -106,18 +106,18 @@ Some of the button styles use a relatively light foreground color, and should on
 
 ### Sizes
 
-Fancy larger or smaller buttons? Add `Size="Size.Large"` or `Size="Size.Small"` for additional sizes.
+Fancy larger or smaller buttons? Add `Size="ButtonSize.Large"` or `Size="ButtonSize.Small"` for additional sizes.
 
 <img src="https://i.imgur.com/Vdiyg6q.jpg" alt="Blazor Bootstrap: Button Component - Sizes" />
 
 ```cshtml showLineNumbers
 <p>
-    <Button Color="ButtonColor.Primary" Size="Size.Large"> Large button </Button>
-    <Button Color="ButtonColor.Secondary" Size="Size.Large"> Large button </Button>
+    <Button Color="ButtonColor.Primary" Size="ButtonSize.Large"> Large button </Button>
+    <Button Color="ButtonColor.Secondary" Size="ButtonSize.Large"> Large button </Button>
 </p>
 <p>
-    <Button Color="ButtonColor.Primary" Size="Size.Small"> Small button </Button>
-    <Button Color="ButtonColor.Secondary" Size="Size.Small"> Small button </Button>
+    <Button Color="ButtonColor.Primary" Size="ButtonSize.Small"> Small button </Button>
+    <Button Color="ButtonColor.Secondary" Size="ButtonSize.Small"> Small button </Button>
 </p>
 ```
 
@@ -385,4 +385,4 @@ HTML tooltips not supported at this moment.
 }
 ```
 
-[See button click events demo here.](https://demos.blazorbootstrap.com/buttons#click-events)
+[See button click events demo here.](https://demos.blazorbootstrap.com/buttons#click-events)