v17.4.1 for KSP 1.12.x

What's Changed

• Further Gas core NTR work by @Capkirk123 in #2910
• Add Wasserfall and derivatives by @Capkirk123 in #2914
• Improve engine description grammar by @NovemberOrWhatever in #2912
• Fix Methane RCS mixture ratio by @Capkirk123
• Tweak A-4's A-9 config mass and reliability by @NathanKell
• Tweak X-405H reliability by @NathanKell

Full Changelog: v17.4.0.0...v17.4.1.0