meetings: mv README{,.md} to enable github markdown rendering

Change-Id: Ic756f5ab16eb6ecbc1e0d73544fe3324fc3a3bc9
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/meetings/README b/meetings/README.md
similarity index 100%
rename from meetings/README
rename to meetings/README.md