Update index.rst (#266)

Author: Kludex

docs/index.rst

@@ -135,7 +135,7 @@ Job Uniqueness
 Sometimes you want a job to only be run once at a time (eg. a backup) or once for a given parameter (eg. generating
 invoices for a particular company).
 
-*arq* supports this via custom job ids, see see :func:`arq.connections.ArqRedis.enqueue_job`. It guarantees
+*arq* supports this via custom job ids, see :func:`arq.connections.ArqRedis.enqueue_job`. It guarantees
 that a job with a particular ID cannot be enqueued again until its execution has finished.
 
 .. literalinclude:: examples/job_ids.py