changes Function node to Code node

[riascho]

we do not use 'Function Nodes' anymore

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[github-actions]

Overall readability score: 43.08 (🟢 +0)

File	Readability
prerequisites.md	51.49 (🟢 +0.31)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
prerequisites.md	51.49	46.98	11.9	12.1	12.82	8.37
	🟢 +0.31	🟢 +0	🟢 +0.03	🟢 +0	🟢 +0.05	🟢 +0.06

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	43.08	34.8	11.67	14.88	14.37	8.54
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less

[freakwriter]

@riascho thanks for catching and updating this. I made one further tweak, to change it to a hyperlink to the Code node itself (because...why not?).