src/meta-openembedded:python3-graphviz: Upgrade 0.14 -> 0.14.1

Add homepage and upgrade to release 0.14.1:

Document the colon-separated node[:port[:compass]] format used
for tail and head points in the edge()- and edges()-methods

License-Update: Use file LICENSE.txt to check the license.

Signed-off-by: Leon Anavi <[email protected]>
Signed-off-by: Khem Raj <[email protected]>
Acked-by: Trevor Gamblin <[email protected]>

Author: leon-anavi