docs(source-paypal-transaction): fix spelling, grammar, and changelog date

[devin-ai-integration]

What

Improves the source-paypal-transaction connector documentation by fixing spelling/grammar errors, correcting the changelog date for v2.6.26, and fixing a technical inaccuracy. Triggered by review of commit 16eda09 (#74027).

How

Single-file edit to docs/integrations/sources/paypal-transaction.md:

• Spelling/grammar: Fixed ~15 typos and grammatical errors (searech, defaukt, produciton, configuraiton, retreiving, alowed, is differs, etc.)
• Branding: Corrected "Paypal" → "PayPal" in headings and body text
• Changelog date: v2.6.26 date corrected from 2026-02-26 to 2026-02-27 to match the actual merge date of PR fix(source-paypal-transaction): use 3-digit milliseconds for disputes datetime format (AI-Triage PR) #74027
• Technical fix: Corrected start_end → start_date in the Search Invoices info block (matches the actual config field name in manifest.yaml)
• Deprecation notice: Added info block noting that the PayPal Payments API v1 (used by the List Payments stream) is deprecated by PayPal
• Clarity: Reformatted setup steps 8–10 for readability; tightened caution blocks

Review guide

1. docs/integrations/sources/paypal-transaction.md — the only file changed

Items worth verifying:

• The start_end → start_date rename (line 213) — confirm this matches the connector's actual config field
• The Payments API v1 deprecation notice (lines 223–225) — confirm this is appropriate to surface to users
• Changelog date correction for v2.6.26 (line 269) — 2026-02-27 matches the merge timestamp of the commit

User Impact

Documentation-only change. No runtime or connector behavior changes. Users get more accurate and readable docs.

Can this PR be safely reverted and rolled back?

• YES 💚

---

Note: This PR was created by Devin AI, an automated documentation assistant, based on a review of recent connector changes. Reviewers may merge, modify, or close this PR as they see fit.

Requested by: bot_apk (apk@cognition.ai)
Link to Devin run: https://app.devin.ai/sessions/646f7ec2c9df4e3eb80854b2b5b2e3a2

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