General update

Author: AllThingsSmitty

CONTRIBUTING.md

@@ -21,7 +21,7 @@ Please ensure your pull request adheres to the following guidelines:
     - If the presentation is a screencast or playlist use `(screencast)` or `(playlist)` in lieu of `Event`.
     - The duration should be surrounded by backticks (`), e.g., `28:30`.
 * Use the correct title of the presentation (don't rely on the title uploaded to YouTube, Vimeo, et al.).
-* Use [title-casing](http://titlecapitalization.com). 
+* Use [title-case](https://titlecaseconverter.com/). 
 * Add suggestions to the end of the appropriate year block; if re-ordering is needed project maintainer will make a final determination.
 
 Thank you for your suggestions!