all: apply go fix

Updates #cleanup

Signed-off-by: Adriano Sela Aviles <adriano@tailscale.com>

net/art/table.go

@@ -553,10 +553,7 @@ func computePrefixSplit(a, b netip.Prefix) (lastCommon netip.Prefix, aStride, bS
 		panic("computePrefixSplit called with mismatched address families")
 	}
 
-	minPrefixLen := a.Bits()
-	if b.Bits() < minPrefixLen {
-		minPrefixLen = b.Bits()
-	}
+	minPrefixLen := min(b.Bits(), a.Bits())
 
 	commonBits := commonBits(a.Addr(), b.Addr(), minPrefixLen)
 	// We want to know how many 8-bit strides are shared between a and