### 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
tk = _get_token();
					}
					arg.array_size = arg_array_size;
					func_node->arguments.push_back(arg);
					if (tk.type == TK_COMMA) {
						tk = _get_token();
						
					} else if (tk.type != TK_PARENTHESIS_CLOSE) {
						_set_expected_error(",", ")");
						return ERR_PARSE_ERROR;
					}
				}
				if (p_functions.has(name)) {
					
					if (func_node->arguments.size() > 0) {
						_set_error(vformat(RTR("Function '%s' expects no arguments."), String(name)));
						return ERR_PARSE_ERROR;
					}
					if (func_node->return_type != TYPE_VOID) {
						_set_error(vformat(RTR("Function '%s' must be of '%s' return type."), String(name), "void"));
						return ERR_PARSE_ERROR;
					}
				}
				
				tk = _get_token();
				if (tk.type != TK_CURLY_BRACKET_OPEN) {
					_set_error(RTR("Expected a '{' to begin function."));
					return ERR_PARSE_ERROR;
				}
				current_function = name;