openexr: CC individual maintainers instead of security@openexr.com (#14205)

On second thought, security@openexr.org is moderated so the message
require individual approval before they're delivered, which is
problematic if the moderator (me) is inaccessible. Better to list the 3
primary maintainers directly.

Signed-off-by: Cary Phillips <cary@ilm.com>
Co-authored-by: DavidKorczynski <david@adalogics.com>

Author: cary-ilm

projects/openexr/project.yaml

@@ -3,8 +3,7 @@ language: c++
 primary_contact: "twodeecoda@gmail.com"
 auto_ccs:
   - "cary@ilm.com"
-  - "cbpilm@gmail.com"
-  - "security@openexr.org"
+  - "twodeecoda@gmail.com"
   - "kdt3rd@gmail.com"
 main_repo: 'https://github.com/AcademySoftwareFoundation/openexr'