1.0.6 Mod updates, README polish

• Updated Engi_M1_Autofire 1.1.4 → 1.2.0
  • Risk of Options support.
  • Fixed a bunch of config options being missing.
• Updated R2API_Core 5.0.3 → 5.0.4
  • Added SystemInitializerInjector class to the Utils namespace
• Updated R2API_Elites 1.0.0 → 1.0.1
  • Fix some non working custom ramps (ramp index not properly set)
  • Always enable EliteAPI hooks (potential fix for a Spikestrip elite color bug)
• Appended /s to the end of Thunderstore links to avoid unnecessary redirects.
• Added a # after the / in the Thunderstore link to this Modpack's package page so that it doesn't reload when pressed from Thunderstore.
• Updated thank you downloads number to 500!
• Fixed typo in previous changelog.