update cppcheck url

Author: danmar

README.md

@@ -1,6 +1,6 @@
 ![Java CI](https://github.com/kwin/cppcheclipse/workflows/Java%20CI/badge.svg)
 
-cppcheclipse is an Eclipse plugin which integrates [cppcheck](http://sourceforge.net/projects/cppcheck/) with the [CDT project](https://eclipse.org/cdt/). You can run/configure cppcheck from the Eclipse UI.
+cppcheclipse is an Eclipse plugin which integrates [cppcheck](https://cppcheck.sourceforge.io) with the [CDT project](https://eclipse.org/cdt/). You can run/configure cppcheck from the Eclipse UI.
 
 To build the project on the command line it requires maven, Run the following commands:
 ```bash