[CLA] signature for Ark74

Closes #28126

doc/cla/individual/ark74.md

+Mexico, 2018-10-24
+
+I hereby agree to the terms of the Odoo Individual Contributor License
+Agreement v1.0.
+
+I declare that I am authorized and able to make this agreement and sign this
+declaration.
+
+Signed,
+
+Luis Guzman ark@switnet.org https://github.com/ark74