bgpd: Fix typo in debug message

bgpd: Fix typo in debug message

Cosmetic change for the debug messages, mainly on the parentheses.

Before:
```
[ZJYCS-KQYD6] VRF vrf-debug(140): Rcvd NH update 50.50.50.0/24(0)0) - metric 300/300 #nhops 2/1 flags Valid Reg Static Static Exact
[VZJVD-D7GXM] parse nexthop update(50.50.50.0/24(0)(VRF vrf-debug)): bnc info not found for nexthop cache
[NSWTE-81HEK] parse nexthop update(50.50.201.0/31(0)(VRF vrf-debug)): bnc info not found for import check
```

After:
```
[ZJYCS-KQYD6] VRF vrf-debug(140): Rcvd NH update 50.50.50.0/24(0)(0) - metric 300/300 #nhops 2/1 flags Valid Reg Static Static Exact
[VZJVD-D7GXM] parse nexthop update 50.50.50.0/24(0)(VRF vrf-debug): bnc info not found for nexthop cache
[NSWTE-81HEK] parse nexthop update 50.50.201.0/31(0)(VRF vrf-debug): bnc info not found for import check
```

Signed-off-by: anlan_cs <vic.lan@pica8.com>