fix(input): prefix don't render when value is str

Author: kovsu

components/input/Input.tsx

@@ -129,6 +129,12 @@ export default defineComponent({
           {hasFeedback && feedbackIcon}
         </>
       );
+      const prefixNode = (hasFeedback || prefix) && (
+        <>
+          {prefix}
+          {hasFeedback && feedbackIcon}
+        </>
+      );
       const prefixClsValue = prefixCls.value;
       const inputHasPrefixSuffix = hasPrefixSuffix({ prefix, suffix }) || !!hasFeedback;
       const clearIcon = slots.clearIcon || (() => <CloseCircleFilled />);
@@ -144,6 +150,7 @@ export default defineComponent({
           autocomplete={autocomplete.value}
           onBlur={handleBlur}
           onFocus={handleFocus}
+          prefix={prefixNode}
           suffix={suffixNode}
           allowClear={allowClear}
           addonAfter={