fix(mod_geoip.sls): fix salt-lint errors

```bash Examining apache/mod_geoip.sls of type state [201] Trailing whitespace apache/mod_geoip.sls:30 - source: ```
saltstack-formulas · Oct 17, 2019 · e55ef9b · e55ef9b
1 parent d011324
commit e55ef9b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/apache/mod_geoip.sls b/apache/mod_geoip.sls
@@ -27,7 +27,7 @@ geoip conf:
     - user: root
     - group: root
     - mode: 644
-    - source: 
+    - source:
       - salt://apache/files/{{ salt['grains.get']('os_family') }}/geoip.conf
 
 geoip database: