Update join-nodes.md

Fixed @justincormack's clarification on running a mixed-FIPS environment.
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Anne Henmi 2018-10-04 19:29:09 -06:00 committed by GitHub
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@ -27,8 +27,9 @@ you subsequently rotate the token, it doesn't affect existing swarm nodes. Refer
to [Run Docker Engine in swarm mode](swarm-mode.md#view-the-join-command-or-update-a-swarm-join-token).
**NOTE:** Docker allows a non-FIPS enabled worker or manager nodes to a FIPS-enabled
swarm cluster. This can cause issues with upgrading a swarm if nodes are FIPS-enabled and other
nodes are not FIPS-enabled.
swarm cluster.
While a mixed-FIPS environment makes upgrading or changing status easier, Docker recommends not running a mixed-FIPS environment in production.
## Join as a worker node