Add myself to CREDITS.md
Add myself to CREDITS.md

Signed-off-by: ganoam <2cecbc21e09cdef9f86b963dc2f65af742f62344@live.com>

AmbiML/ibex,AmbiML/ibex,lowRISC/ibex,lowRISC/ibex,lowRISC/ibex,lowRISC/ibex,AmbiML/ibex,AmbiML/ibex