DOC-1008: Update SSH credential to medium tier template

[freakwriter]

Small tweaks for readability and guidance, otherwise just converted bullets to numbered list since it seemed silly to repeat them twice.

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Overall readability score: 42.58 (🟢 +0)

File	Readability
ssh.md	88.38 (🟢 +2.12)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [ssh.md](https://github.com/n8n-io/n8n-docs/blob/fff843af7bc654aff857150196981b5dc2bd9059/docs/integrations/builtin/credentials/ssh.md "docs/integrations/builtin/credentials/ssh.md") | 88.38 | 68.47 | 6.28 | 6 | 7.17 | 6.23   | 🟢 +2.12 | 🔴 -2.23 | 🟢 +0.11 | 🟢 +0 | 🟢 +0.4 | 🟢 +0.54 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 42.58 | 34.42 | 11.74 | 14.97 | 14.43 | 8.58   | 🟢 +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