### Godot version

4.0.beta14

### System information

windows 10, gles 3, nvidia graphics

### Issue description

SCREEN_TEXTURE  was dropped in beta 14. The suggested replacement is to use ```uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmaps;```, but filter_linear_mipmaps is not recognized as a valid shader type hint and a shader using it fails to compile.

### Steps to reproduce

Create a canvas item shader and use the filter_linear_mipmaps type hint with a sampler2D uniform.

### Minimal reproduction project

N/A
return _make_token(TK_ERROR, "Invalid (unsigned integer) numeric constant");
							} else {
								return _make_token(TK_ERROR, "Invalid (integer) numeric constant");
							}
						}
					}
					char_idx += str.length();
					Token tk;
					if (period_found || exponent_found || float_suffix_found) {
						tk.type = TK_FLOAT_CONSTANT;
					} else if (uint_suffix_found) {
						tk.type = TK_UINT_CONSTANT;
					} else {
						tk.type = TK_INT_CONSTANT;
					}
					if (hexa_found) {
						tk.constant = (double)str.hex_to_int();
					} else {
						tk.constant = str.to_float();
					}
					tk.line = tk_line;
					return tk;
				}
				if (GETCHAR(0) == '.') {
					
					char_idx++;
					return _make_token(TK_PERIOD);
				}
				if (is_ascii_identifier_char(GETCHAR(0))) {