Fix dead link to Webkit C++ style guide (#10)

Author: aprotyas

README.md

@@ -6,7 +6,7 @@ This is a comparison of the following coding styles:
 - [Google](https://google.github.io/styleguide/cppguide.html)
 - [Chromium](http://www.chromium.org/developers/coding-style)
 - [Mozilla](https://firefox-source-docs.mozilla.org/code-quality/coding-style/coding_style_cpp.html)
-- [WebKit](http://www.webkit.org/coding/coding-style.html)
+- [WebKit](https://webkit.org/code-style-guidelines/)
 - [Microsoft](https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference?view=vs-2019)
 - [GNU](https://www.gnu.org/prep/standards/standards.html)