ci: fix br_bfd acceptance test
The default BFD interval was increased
```
DesiredMinTxInterval:  200 * time.Millisecond,
```
Therefore we bump the timeout in the test also.
@@ -202,7 +202,7 @@ func (t *Case) Run(cfg *RunConfig) error {
ePkt := ExpectedPacket{
Storer: storer,
DevName: t.ReadFrom,
- Timeout: 250 * time.Millisecond,
+ Timeout: 350 * time.Millisecond,
IgnoreNonMatching: t.IgnoreNonMatching,
Pkt: wantPkt,
}
