[ADD] - dbfilter_from_header: Added old contributors

dbfilter_from_header/README.rst

@@ -38,6 +38,12 @@ Credits
 Contributors
 ------------
 
+* Stéphane Bidoul <stephane.bidoul@acsone.eu>
+* Yannick Vaucher <yannick.vaucher@camptocamp.com>
+* Alexandre Fayolle <alexandre.fayolle@camptocamp.com>
+* Holger Brunn <hbrunn@therp.nl>
+* Laurent Mignon (aka lmi) <laurent.mignon@acsone.eu>
+* Sandy Carter <sandy.carter@savoirfairelinux.com>
 * Fabio Vilchez <fabio.vilchez@clearcorp.co.cr>
 
 Maintainer
@@ -53,4 +59,4 @@ OCA, or the Odoo Community Association, is a nonprofit organization whose
 mission is to support the collaborative development of Odoo features and
 promote its widespread use.
 
-To contribute to this module, please visit https://odoo-community.org.
+To contribute to this module, please visit https://odoo-community.org.