Fix double colon in Sentinel SAP systemconfig file structure

Author: Rageking8

articles/sentinel/sap/reference-systemconfig-json.md

@@ -45,7 +45,7 @@ The following code shows the overall structure of the `systemconfig.json` file:
 
     "connector_configuration": {...},
 
-    "abap_table_selector":: {...}
+    "abap_table_selector": {...}
 
 ...