chore: self-nominate for maintainer status (#360)

I'm strongly committed to the success of the Baseline and my contribution
history recently achieved the 6 month mark necessary for self-nomination.

https://github.com/ossf/security-baseline/graphs/contributors?from=1%2F18%2F2025

Signed-off-by: Travis Truman <[email protected]>

Author: trumant

governance/MAINTAINERS.md

@@ -8,6 +8,7 @@
 - David A Wheeler, OpenSSF (@david-a-wheeler)
 - Ben Cotton, Kusari (@funnelfiasco)
 - Evan Anderson, Custcodian (@evankanderson)
+- Travis Truman, CVS Health (@trumant)
 
 ## Emeritus Maintainers