Update allowed_signers (#31)

Author: aboodman

.github/signing/allowed_signers

@@ -39,8 +39,9 @@
 # ADD TEAM PUBLIC KEYS BELOW THIS LINE:
 #
 
-greg@roci.dev namespaces="git",valid-after="20260707" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAiOsX/hyYIEVIJX4fO0spMlh9tSXqMWJ6LwyVBZu5Ls greg-new-mac-2026
+aa@roci.dev namespaces="git",valid-after="20260708" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFq/gXedDlqUPHobZzm9VTzcZTwwf78oDJJFDZ1ev3KL aa-greybook-2026
 arv@roci.dev namespaces="git",valid-after="20260701" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBSXMQ1oBIet6Xf9S/Bqdd6bRV0Z8TiyVn2JAMvmO5cj arv-new-mac-2026
 chase@roci.dev namespaces="git",valid-after="20260701" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBaObZrJF4AbqfGLAWgmXPfF1tXYp6cuXIjAsTAKwlpd chase-new-mac-2026
-mlaw@roci.dev namespaces="git",valid-after="20260701" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIP4K3oqdHhKA3zwCo+KK80L7XclYCwgXiylaNuNbasYo matt-new-mac-2026
 d@roci.dev namespaces="git",valid-after="20260707" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBbNqV94EUcC3bf0j+B6AAFMjkEYkUZ7YBTvh1TAnItd darick-new-mac-2026
+greg@roci.dev namespaces="git",valid-after="20260707" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAiOsX/hyYIEVIJX4fO0spMlh9tSXqMWJ6LwyVBZu5Ls greg-new-mac-2026
+mlaw@roci.dev namespaces="git",valid-after="20260701" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIP4K3oqdHhKA3zwCo+KK80L7XclYCwgXiylaNuNbasYo matt-new-mac-2026