docs(nextjs): Minor updates on manual guide

[inventarSarah]

DESCRIBE YOUR PR

Some small updates based on the feedback received on the Next.js manual quick start guide:

• added new item to the "What does the installation wizard change inside your application?" list
• updated title of the Expandable that offers user support if they have issues setting up the SDK

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• Urgent deadline (GA date, etc.):
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• None: Not urgent, can wait up to 1 week+

SLA

• Teamwork makes the dream work, so please add a reviewer to your PRs.
• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it.
  Thanks in advance for your help!

PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

EXTRA RESOURCES

• Sentry Docs contributor guide

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 20, 2025 1:58pm

2 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
changelog	⬜️ Ignored (Inspect)			Feb 20, 2025 1:58pm
develop-docs	⬜️ Ignored (Inspect)			Feb 20, 2025 1:58pm

[codecov]

Bundle Report

Changes will decrease total bundle size by 15 bytes (-0.0%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	10.94MB	-9 bytes (-0.0%) ⬇️
sentry-docs-client-array-push	9.39MB	-6 bytes (-0.0%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	865.35kB	-0.0%
static/chunks/1298-*.js	-3 bytes	401.61kB	-0.0%
static/U3-*.js (New)	77 bytes	77 bytes	100.0% 🚀
static/U3-*.js (New)	578 bytes	578 bytes	100.0% 🚀
static/B5kwTEaNOs0w0Im1t8MLS/_buildManifest.js (Deleted)	-578 bytes	0 bytes	-100.0% 🗑️
static/B5kwTEaNOs0w0Im1t8MLS/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.71MB	-0.0%
../instrumentation.js	-3 bytes	1.04MB	-0.0%
9523.js	-3 bytes	1.02MB	-0.0%