fix missing semicolon

Author: MartinVerges

wifimanager.h

@@ -62,7 +62,7 @@ class WIFIMANAGER {
     void clearApList();
 
     // Get id of the first non empty entry
-    uint8_t getApEntry()
+    uint8_t getApEntry();
 
     // Print a log message to Serial, can be overwritten
     void logMessage(String msg);