openssh/sshd_config: Fixup sed patterns
openssh/sshd_config: Fixup sed patterns

Modify sed expression to match a space after each token to ensure we
only match whole words.

Signed-off-by: Haris Okanovic <4f2c24956fa4a8756878315db434b9fed29fa615@ni.com>
Natinst-ReviewBoard-ID: 285816

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt