Xero Credentials - adds hint about name and url for xero app setup

[mariaremote]

https://linear.app/n8n/issue/DOC-944/update-xero-credential-setup-instructions

[CLAassistant]

All committers have signed the CLA.

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[github-actions[bot]]

Overall readability score: 41.16 (🟢 +0)

File	Readability
xero.md	56.75 (🟢 +2.43)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [xero.md](https://github.com/n8n-io/n8n-docs/blob/0f81ff7e67ed447cc1177453eb0a6817d40256f9/docs/integrations/builtin/credentials/xero.md "docs/integrations/builtin/credentials/xero.md") | 56.75 | 42.27 | 8.94 | 12.2 | 13.38 | 7.78   | 🟢 +2.43 | 🟢 +5.92 | 🔴 -0.42 | 🟢 +0.6 | 🟢 +1.33 | 🔴 -0.18 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 41.16 | 33.71 | 12.02 | 15.34 | 14.45 | 8.66   | 🟢 +0 | 🟢 +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

[Joffcom]

@mariaremote don't forget to sign the CLA