move some forks to the official org

Author: SethTisue

proj/fastparse.conf

@@ -1,10 +1,10 @@
-// https://github.com/SethTisue/fastparse.git#seth-20201008
+// https://github.com/scalacommunitybuild/fastparse.git#community-build-2.13  # was lihaoyi
 
 // 2.13: forked to add sbt build (instead of mill)
 
 vars.proj.fastparse: ${vars.base} {
   name: "fastparse"
-  uri: "https://github.com/SethTisue/fastparse.git#a25cb7a694abce082b18685ea28aa30620ad63cb"
+  uri: "https://github.com/scalacommunitybuild/fastparse.git#a25cb7a694abce082b18685ea28aa30620ad63cb"
 
   extra.commands: ${vars.default-commands} [
     // historically, too prone to unexplained failure

proj/geny.conf

@@ -1,7 +1,9 @@
-// https://github.com/SethTisue/geny.git#seth-20201008
+// https://github.com/scalacommunitybuild/geny.git#community-build-2.13  # was lihaoyi
+
+// forked to add sbt build (instead of mill)
 
 vars.proj.geny: ${vars.base} {
   name: "geny"
-  uri: "https://github.com/SethTisue/geny.git#4de1af7930d08c54504bf00385bb22abfbf5dc87"
+  uri: "https://github.com/scalacommunitybuild/geny.git#4de1af7930d08c54504bf00385bb22abfbf5dc87"
 
 }