shovel/dig: bugfix. address[] should be bytes20[] instead of bytes32[]

If you are indexing an event with an array of addresses, the input type
for that field will be address[]. In this case, when the db type
encoding function is presented with an item from the address[] it should
treat the bytes as an address, meaning: keep only 20 msb.

dig/dig.go

@@ -961,7 +961,7 @@ func dbtype(abitype string, d []byte) any {
 		var x uint256.Int
 		x.SetBytes(d)
 		return x.Dec()
-	case abitype == "address":
+	case strings.HasPrefix(abitype, "address"):
 		if len(d) == 32 {
 			return d[12:]
 		}