Update TempDir Javadoc

Author: scordio

junit-jupiter-api/src/main/java/org/junit/jupiter/api/io/TempDir.java

@@ -40,11 +40,20 @@
  *
  * <p>The temporary directory is only created if a field in a test class or a
  * parameter in a lifecycle method or test method is annotated with
- * {@code @TempDir}. If the field type or parameter type is neither {@link Path}
- * nor {@link File}, if a field is declared as {@code final}, or if the temporary
- * directory cannot be created, an {@link ExtensionConfigurationException} or a
- * {@link ParameterResolutionException} will be thrown as appropriate. In
- * addition, a {@code ParameterResolutionException} will be thrown for a
+ * {@code @TempDir}.
+ * An {@link ExtensionConfigurationException} or a {@link ParameterResolutionException}
+ * will be thrown in one of the following cases:
+ *
+ * <ul>
+ * <li>If the field type or parameter type is neither {@link Path} nor {@link File}.</li>
+ * <li>If a field is declared as {@code final}.</li>
+ * <li>If the temporary directory cannot be created.</li>
+ * <li>If the field type or parameter type is {@code File} and a custom
+ *     {@link TempDir#factory() factory} is used, which creates a temporary directory that does
+ *     not belong to the {@link java.nio.file.FileSystems#getDefault() default file system}.</li>
+ * </ul>
+ *
+ * In addition, a {@code ParameterResolutionException} will be thrown for a
  * constructor parameter annotated with {@code @TempDir}.
  *
  * <h2>Scope</h2>