### Godot version

4.0.beta13 (caacade56)

### System information

Windows 10

### Issue description

Seems like this was missed in #62011 and #70540. `@export_multiline` should also support the PackedStringArray datatype on top of Array[String] and Dictionary, but it doesn't, instead giving the error `"@export_multiline" annotation requires a variable of type "String" but type "PackedStringArray" was given instead.`

### Steps to reproduce

Create a PackedStringArray with the `@export_multiline` annotation.
```gdscript
@export_multiline var npc_dialog: PackedStringArray
```

### Minimal reproduction project

N/A
}
				if (colon_pos == stripped_line.length() || stripped_line[colon_pos++] != ':') {
					continue; 
				}
				title = stripped_line.substr(open_bracket_pos, close_bracket_pos - open_bracket_pos).strip_edges();
				link = stripped_line.substr(colon_pos).strip_edges();
			}
			mode = TUTORIALS;
			in_codeblock = false;
		} else if (stripped_line.is_empty()) {
			continue;
		} else {
			
			if (mode == TUTORIALS) {
				mode = DONE;
			}
			in_codeblock = _in_codeblock(doc_line, in_codeblock, &codeblock_begins);
		}
		if (in_codeblock) {
			int i = 0;
			for (; i < codeblock_begins; i++) {
				if (doc_line[i] != ' ') {
					break;
				}
			}
			doc_line = doc_line.substr(i);
		} else {
			doc_line = stripped_line;
		}
		String line_join = (in_codeblock) ? "\n" : " ";