Add new examples to release notes

doc/releasenotes.rst

@@ -4,6 +4,9 @@ Release notes
 Version 1.8
 -----------
 
+* New example applications using:
+  - PyQt5 with QML
+  - `Pywebview <https://github.com/r0x0r/pywebview>`__
 * The code to pick an appropriate wheel now considers wheels with Python version
   specific ABI tags like ``cp35m``, as well as the stable ABI tags like ``abi3``.
 * Fixed a bug with fetching a wheel when another version of the same package