docs: v6.6.3 catch-up - #69

Running Vale across on the following files affected by this PR:

- node/node-types.mdx
- node/technical-reference.mdx

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node/node-types.mdx:
	- 16:4    Use sentence case for headings: 'Commonly Used Ports'.
	- 31:4    Use sentence case for headings: 'Systemd File Template'.

node/technical-reference.mdx:
	- 12:4     Use sentence case for headings: 'Command Line Interface Reference'.
	- 18:5     Use sentence case for headings: 'Node Management Commands'.
	- 41:1     Use sentence case for headings: 'Freeze Mode ( *************** )'.
	- 71:5     Use sentence case for headings: 'Frozen RPC Router'.
	- 97:6     Use sentence case for headings: 'Routing Rules'.
	- 104:6    Use sentence case for headings: 'Route Header'.
	- 110:5    Use sentence case for headings: 'seidb Tooling Commands'.
	- 114:6    Use sentence case for headings: 'Reporting FlatKV EVM Migration Status'.
	- 140:6    Use sentence case for headings: 'Comparing EVM State Across Backends'.
	- 180:5    Use sentence case for headings: 'Autobahn (GigaRouter) Config Generation'.
	- 211:6    Use sentence case for headings: 'Giga Mode Behavior and Per-Block Limits'.
	- 229:6    Use sentence case for headings: 'Autobahn Committee and Network Message Limits'.
	- 248:5    Use sentence case for headings: 'Key Management'.
	- 273:5    Use sentence case for headings: 'Transaction Commands'.
	- 291:4    Use sentence case for headings: 'Configuration Parameters'.
	- 296:5    Use sentence case for headings: 'App.toml Parameters'.
	- 408:4    Use sentence case for headings: 'Network Parameters'.
	- 412:5    Use sentence case for headings: 'Chain Parameters'.
	- 440:4    Use sentence case for headings: 'File Locations'.


Found 21 suggested changes across 2 files in 639.49ms