Bump to v5.4.0-rc3

Signed-off-by: Matt Heon <mheon@redhat.com>

Author: mheon

version/rawversion/version.go

@@ -7,4 +7,4 @@ package rawversion
 //
 // NOTE: remember to bump the version at the top of the top-level README.md
 // file when this is bumped.
-const RawVersion = "5.4.0-dev"
+const RawVersion = "5.4.0-rc3"