CODEOWNERS: add Acceleration team to the .github/chainguard/ folder so they too can manage bot sts policies (#52845)

Signed-off-by: James Rawlings <[email protected]>

Author: rawlingsj

CODEOWNERS

@@ -9,6 +9,7 @@ CODEOWNERS @wolfi-dev/foundations-squad
 
 # Important CI and Repo configuration
 .github/                @wolfi-dev/foundations-squad
+.github/chainguard/     @wolfi-dev/foundations-squad @wolfi-dev/acceleration
 .pre-commit-config.yaml @wolfi-dev/foundations-squad
 
 # Makefile and pipeline changes require approval of the Foundations squad.