bgpd: fix no set as_path replace command

bgpd: fix no set as_path replace command

fix to avoid "Excessive docstring" message

sharpd@eva ~/frr (tests_need_to_be_stricter)> sudo /usr/lib/frr/bgpd
--log stdout --log-level debug --daemon
2023/06/30 09:47:25 BGP: [K2CCG-5Y7ZJ] Excessive docstring while
parsing 'no set as-path replace [<any|ASNUM>]
[<ASNUM>$configured_asn]'
2023/06/30 09:47:25.361807 BGP: [K2CCG-5Y7ZJ] Excessive docstring
while parsing 'no set as-path replace [<any|ASNUM>]
[<ASNUM>$configured_asn]'
2023/06/30 09:47:25 BGP: [W7ENN-K2SVA] ----------
2023/06/30 09:47:25.361839 BGP: [W7ENN-K2SVA] ----------
2023/06/30 09:47:25 BGP: [WCW75-6TZPF] Define the configured AS number
2023/06/30 09:47:25.361842 BGP: [WCW75-6TZPF] Define the configured AS
number
2023/06/30 09:47:25 BGP: [W7ENN-K2SVA] ----------
2023/06/30 09:47:25.361844 BGP: [W7ENN-K2SVA] ----------
2023/06/30 09:47:25.382835 BGP: [T83RR-8SM5G] bgpd 9.1-dev starting:
vty@2605, bgp@<all>:179

Signed-off-by: Francois Dumontet <francois.dumontet@6wind.com>