Fixing typo

The patch fixes typo which leads to not working
retry procedure in state.

Change-Id: I5f1863f0add3ace7cdee1c5e36a5a57e550ef893

salt/minion/ca.sls

       - x509: {{ ca_key_file }}
     {%- if grains['saltversioninfo'][0] >= 2017 %}
     - retry:
-        attepmts: 5
+        attempts: 5
         until: True
         interval: 60
     {%- endif %}

salt/minion/cert.sls

     {%- endif %}
     {%- if grains['saltversioninfo'][0] >= 2017 %}
     - retry:
-        attepmts: 5
+        attempts: 5
         until: True
         interval: 60
     {%- endif %}