Manpage typo fix.

man/dnsmasq.8

@@ -654,7 +654,7 @@ Provide DS records to act a trust anchors for DNSSEC
 validation. Typically these will be the DS record(s) for Zone Signing
 key(s) of the root zone,
 but trust anchors for limited domains are also possible. The current
-root-zone trust anchors may be donwloaded from https://data.iana.org/root-anchors/root-anchors.xml 
+root-zone trust anchors may be downloaded from https://data.iana.org/root-anchors/root-anchors.xml 
 .TP
 .B --dnssec-check-unsigned
 As a default, dnsmasq does not check that unsigned DNS replies are