Fix reference to socks-extensions.txt in tor-resolve manpage

changes/doc27853

+  o Documentation:
+    - In tor-resolve(1) manpage fix reference to
+      socks-extensions.txt by adding web URL. Resolves
+      ticket 27853.

doc/tor-resolve.1.txt

@@ -47,7 +47,7 @@ SEE ALSO
 --------
 **tor**(1), **torify**(1). +
 
-See doc/socks-extensions.txt in the Tor package for protocol details.
+For protocol details, see: https://spec.torproject.org/socks-extensions
 
 AUTHORS
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