### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
if (error) {
							if (hexa_found) {
								return _make_token(TK_ERROR, "Invalid (hexadecimal) numeric constant");
							}
							if (period_found || exponent_found || float_suffix_found) {
								return _make_token(TK_ERROR, "Invalid (float) numeric constant");
							}
							if (uint_suffix_found) {
								return _make_token(TK_ERROR, "Invalid (unsigned integer) numeric constant");
							}
							return _make_token(TK_ERROR, "Invalid (integer) numeric constant");
						}
						str += symbol;
						i++;
					}
					char32_t last_char = str[str.length() - 1];
					if (hexa_found) { 
						if (str.size() > 11 || !str.is_valid_hex_number(true)) { 
							return _make_token(TK_ERROR, "Invalid (hexadecimal) numeric constant");
						}
					} else if (period_found || exponent_found || float_suffix_found) { 
						if (exponent_found && (!digit_after_exp || (!is_digit(last_char) && last_char != 'f'))) { 
							return _make_token(TK_ERROR, "Invalid (float) numeric constant");
						}
						if (period_found) {
							if (float_suffix_found) {
								
								if (last_char != 'f') {
									return _make_token(TK_ERROR, "Invalid (float) numeric constant");
								}