Merge ~cjohnston/charm-nagios:lp1939042 into charm-nagios:master

[Chris Johnston]

Update `juju set` command references to `juju config`.

LP: #1939042

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 28481b6529d6c6699f65f5a279d93e99f26c6586

diff --git a/README.md b/README.md
index 81cfce5..80d6e58 100644
--- a/README.md
+++ b/README.md
@@ -89,16 +89,16 @@ Will get you the public IP of the web interface.
 #### Typical SSL Workflow for Self Signed Keys:
 
     juju deply nagios central-monitor
-    juju set central-monitor ssl=on
+    juju config central-monitor ssl=on
 
 
 If you purchased keys from a certificate authority:
 
     juju deply nagios central-monitor
-    juju set central-monitor ssl_cert=`base64 mykey.pem`
-    juju set central-monitor ssl_key=`base64 mykey.key`
-    juju set central-monitor ssl_chain=`base64 mykey.csr`
-    juju set central-monitor ssl=on
+    juju config central-monitor ssl_cert=`base64 mykey.pem`
+    juju config central-monitor ssl_key=`base64 mykey.key`
+    juju config central-monitor ssl_chain=`base64 mykey.csr`
+    juju config central-monitor ssl=on
 
 
 ### Known Issues / Caveates