common.utils.StringUtils.java startsWith

[forachange]

Describe the bug

`private static boolean startsWith(final CharSequence str, final CharSequence prefix, final boolean ignoreCase){
...

if (ignoreCase) {
    String lowerCaseStr = str.toString().toLowerCase();
    **String lowerCasePrefix = str.toString().toLowerCase();**
    return lowerCaseStr.startsWith(lowerCasePrefix);
}

...

}`

String lowerCasePrefix = prefix.toString().toLowerCase();

Desktop (please complete the following information):

• Version [nacos-client 2.2.0]