Merge pull request #393 from erwinromkes/patch-1

Add 8.4 for MySQL as possible value

Author: poespas

docs/hypernode-platform/tools/how-to-use-the-hypernode-systemctl-cli-tool.md

@@ -42,7 +42,7 @@ To see which values you can set and which values they are allowed to have take a
 | **mysql_ft_min_word_len**<br/><sub>Set minimum word length for MySQL full-text searches</sub>                                                                   | 4             | 4, 2                                                                                                                                        |
 | **mysql_long_query_time**<br/><sub></sub>                                                                                                                       | 2             | 2, 5, 10, 15, 30                                                                                                                            |
 | **mysql_tmp_on_data_enabled**<br/><sub>Enable temporary data directory on MySQL</sub>                                                                           | False         | True, False                                                                                                                                 |
-| **mysql_version**<br/><sub>Change the MySQL version (note: once set to 5.7 this can't be<br />reverted)</sub>                                                   | 8.0           | 5.6, 5.7, 8.0                                                                                                                               |
+| **mysql_version**<br/><sub>Change the MySQL version (note: once set to 5.7 this can't be<br />reverted)</sub>                                                   | 5.7           | 5.6, 5.7, 8.0, 8.4                                                                                                                          |
 | **new_relic_browser_monitoring_auto_instrument_enabled**<br/><sub></sub>                                                                                        | True          | True, False                                                                                                                                 |
 | **new_relic_distributed_tracing_enabled**<br/><sub></sub>                                                                                                       | True          | True, False                                                                                                                                 |
 | **new_relic_enabled**<br/><sub></sub>                                                                                                                           | False         | True, False                                                                                                                                 |