Update README.md

Author: egoist

README.md

@@ -92,8 +92,8 @@ You can also use the [online tool](https://create-vue-content-loader.netlify.com
 |uniqueKey|string|`randomId()`|Unique ID, you need to make it consistent for SSR|
 |animate|boolean|`true`||
 |baseUrl|string|empty string|Required if you're using <base url="/" /> in your <head/>. Defaults to an empty string. This prop is common used as: <content-loader :base-url="$route.fullPath" /> which will fill the SVG attribute with the relative path. Related [#14](https://github.com/egoist/vue-content-loader/issues/14).|
-|primaryOpacity|number|`1`|Background opacity (0 = transparent, 1 = opaque) used to solve a issue in Safari|
-|secondaryOpacity|number|`1`|Background opacity (0 = transparent, 1 = opaque) used to solve a issue in Safari|
+|primaryOpacity|number|`1`|Background opacity (0 = transparent, 1 = opaque) used to solve an issue in Safari|
+|secondaryOpacity|number|`1`|Background opacity (0 = transparent, 1 = opaque) used to solve an issue in Safari|
 
 
 ## Credits