Update SQL.java

Author: intisy

src/main/java/io/github/intisy/utils/custom/SQL.java

@@ -11,7 +11,7 @@
 
 @SuppressWarnings("unused")
 public class SQL implements AutoCloseable {
-    private final String validCharacters = "[A-Za-z0-9_\\-!:;#$§%&/=?]+";
+    private final String validCharacters = "[A-Za-z0-9_\\-!.:;#$§%&/=?]+";
     private final String url;
     private String username;
     private String password;