changes Function node to Code node

[riascho]

we do not use 'Function Nodes' anymore

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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](https://github.com/n8n-io/n8n-docs/blob/06b659be8f2a2b673ef14b654febc31c91099a48/docs/embed/prerequisites.md "docs/embed/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