DOC-1019: Update LinkedIn credentials to medium tier template

[freakwriter]

Added detailed step-by-step instructions for creating the new app.

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[github-actions[bot]]

Overall readability score: 42.62 (🟢 +0.01)

File	Readability
linkedin.md	65.27 (🟢 +14.52)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [linkedin.md](https://github.com/n8n-io/n8n-docs/blob/54ea2c39410f2791a6cf7fa1abd3c972dbf8ce43/docs/integrations/builtin/credentials/linkedin.md "docs/integrations/builtin/credentials/linkedin.md") | 65.27 | 41.87 | 7.07 | 12.5 | 13.38 | 5.97   | 🟢 +14.52 | 🟢 +15.4 | 🟢 +0.83 | 🟢 +2.2 | 🟢 +2.78 | 🟢 +1.07 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 42.62 | 34.47 | 11.73 | 14.96 | 14.43 | 8.58   | 🟢 +0.01 | 🟢 +0.01 | 🟢 +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