Increase inFlighhtBytesLowWatermark

Expecting us to be able to react within 2ms of an arriving packet
is unrealistic. Updated to 100ms to proved a margin so that the TCP
connection doesn't become idle incase of a minuscule amount of jitter.

ouroboros-network/src/Ouroboros/Network/BlockFetch/DeltaQ.hs

@@ -69,7 +69,7 @@ calculatePeerFetchInFlightLimits PeerGSV {
         seconds = realToFrac
       --FIXME: s is now a function of bytes, not unit seconds / octet
 
-    d = 2e-3 -- 2 milliseconds
+    d = 1e-1 -- 100 milliseconds
     -- But note that the minimum here is based on the assumption that we can
     -- react as the /leading/ edge of the low watermark arrives, but in fact
     -- we can only react when the /trailing/ edge arrives. So when we