readme: don't say that this is my 20% project

The project has been my full-time project since around last summer, so
it's incorrect to say that it's my 20% project.

README.md

@@ -15,10 +15,10 @@
 ## Disclaimer
 
 This is not a Google product. It is an experimental version-control system
-(VCS). It was written by me, Martin von Zweigbergk (martinvonz@google.com). It
-is my personal hobby project and my 20% project at Google. It does not indicate
-any commitment or direction from Google. However, my presentation from Git Merge
-2022 does include some information about Google's plans. See the
+(VCS). I (Martin von Zweigbergk <martinvonz@google.com>) started it as a hobby
+project in late 2019. That said, this it is now my full-time project at Google.
+My presentation from Git Merge 2022 has information about Google's plans. See
+the
 [slides](https://docs.google.com/presentation/d/1F8j9_UOOSGUN9MvHxPZX_L4bQ9NMcYOp1isn17kTC_M/view)
 or the [recording](https://www.youtube.com/watch?v=bx_LGilOuE4).