Add vs2022 to summary at the top of README.md (#568)

(added to changelog lower in the file in pull request #536)

Author: Skylark13

README.md

@@ -18,7 +18,7 @@ Supported project generators:
  * GNU Makefile
  * [JSON Compilation Database][jcdb]
  * Ninja (experimental)
- * Visual Studio 2010, 2012, 2013, 2015, 2017, 2019
+ * Visual Studio 2010, 2012, 2013, 2015, 2017, 2019, 2022
  * XCode
 
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