[CLA] Signature for Vmaxadmin

closes odoo/odoo#42212

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

doc/cla/individual/vmaxadmin.md

+Vietnam, 2019-12-19
+
+Vmax Ltd.Co agrees to the terms of the Odoo Corporate Contributor License
+Agreement v1.0.
+
+I declare that I am authorized and able to make this agreement and sign this
+declaration.
+
+Signed,
+
+Vmax admin@vmax.vn https://github.com/vmaxadmin
+
+List of contributors:
+
+Vmax admin@vmax.vn https://github.com/vmaxadmin
+Minh Nguyen minhnguyen.vmax@gmail.com https://github.com/Minhvmax
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