Update .agent/rules/commit_style.md

Make email generic

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Liam Girdwood <lgirdwood@gmail.com>

Author: lgirdwood

.agent/rules/commit_style.md

@@ -20,5 +20,5 @@ Commit messages must be formatted with a subject line and a body, following this
 Every commit message must end with a `Signed-off-by:` line using the user's name and email from the local git config:
 
 ```
-Signed-off-by: Liam Girdwood <lgirdwood@gmail.com>
+Signed-off-by: <name> <email>
 ```