github: update workflows codeowners

Signed-off-by: Mikko Ylinen <[email protected]>

Author: mythi

.github/CODEOWNERS

@@ -5,7 +5,7 @@
 *                   @kad @mythi @bart0sh @tkatila
 
 # CI and building
-.github/workflows/  @bart0sh @kad @mythi
+.github/workflows/  @bart0sh @kad @mythi @tkatila
 /scripts/           @bart0sh @kad @mythi
 
 # Binaries