Add salaheldin to CODEOWNERS (#1678) #7043

Job	Run time
Linux Arm	19m 42s
Docs	1m 13s
Mac Arm	11m 1s
Linux x86-64	44m 6s
Repolinter	20s
Windows	27m 46s
Container Image	12m 28s
Mac Intel	1s
Stdlib	2m 17s
Mac Universal Binary	0s
Soroban Integration test	9m 50s
Polkadot Integration test	6m 33s
Anchor Integration test	4m 50s
Solana Integration test	3m 26s
Visual Code Extension	2m 10s
Polkadot Integration test with subxt	4m 46s
Coverage report	1m 55s
	2h 32m 24s

Provide feedback