[doc] service.html - switch www.fsf.org/resources/service to https

[Gerald Pfeifer]

...which is the new default there (and redirects from plain http).

Committed.

Gerald

2018-09-23  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/service.texi (Service): Switch the fsf.org link to https.

Index: doc/service.texi
===================================================================
--- doc/service.texi	(revision 264513)
+++ doc/service.texi	(working copy)
@@ -20,7 +20,7 @@
 @item
 Look in the service directory for someone who might help you for a fee.
 The service directory is found at
-@uref{http://www.fsf.org/resources/service}.
+@uref{https://www.fsf.org/resources/service}.
 @end itemize
 
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