Update README.md (#972)

a minor typo! course -> cause

Author: SimantaRajSarma

README.md

@@ -328,7 +328,7 @@ const styles = StyleSheet.create({
 | style                          |                            object                             | {backgroundColor:"#eee"} | support normal view style, you can use this to set border/spacing color...                                                                                                    | ✔   | ✔       | ✔                           | <3.0 
 | progressContainerStyle         |                            object                             | {backgroundColor:"#eee"} | support normal view style, you can use this to set border/spacing color...                                                                                             | ✔   | ✔       | ✔                           | 6.9.0                     |
 | renderActivityIndicator        |                    (progress) => Component                    |      <ProgressBar/>      | when loading show it as an indicator, you can use your component                                                                                                              | ✔   | ✔       | ✖                           | <3.0                     |
-| enableAntialiasing             |                             bool                              |           true           | improve rendering a little bit on low-res screens, but maybe course some problem on Android 4.4, so add a switch                                                              | ✖   | ✔       | ✖                           | <3.0                     |
+| enableAntialiasing             |                             bool                              |           true           | improve rendering a little bit on low-res screens, but maybe cause some problem on Android 4.4, so add a switch                                                              | ✖   | ✔       | ✖                           | <3.0                     |
 | enablePaging                   |                             bool                              |          false           | only show one page in screen                                                                                                                                                  | ✔   | ✔       | ✔                           | 5.0.1                    |
 | enableRTL                      |                             bool                              |          false           | scroll page as "page3, page2, page1"                                                                                                                                          | ✔   | ✖       | ✔                           | 5.0.1                    |
 | enableAnnotationRendering      |                             bool                              |           true           | enable rendering annotation, notice:iOS only support initial setting,not support realtime changing                                                                            | ✔   | ✔       | ✖                           | 5.0.3                    |
@@ -391,4 +391,4 @@ Set the current page of the PDF component. pageNumber is a positive integer. If
 Example:
 ```
 this.pdf.setPage(42); // Display the answer to the Ultimate Question of Life, the Universe, and Everything
-```
+```