docs(js): Update source map upload docs for rr hydrogen

[chargome]

ref getsentry/sentry-javascript#17885

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
sentry-docs	Ready	Preview	Comment	Oct 8, 2025 2:35pm

1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ignored			Oct 8, 2025 2:35pm

[seer-by-sentry]

Potential bug: Incorrect documentation for source map path leads to silent upload failure

• Description: The documentation for Hydrogen with React Router provides an incorrect and generic placeholder path (/path/to/build/dir) for the sentry-cli sourcemaps inject command. The correct path for Hydrogen projects is the dist directory. Using the incorrect path will cause the CLI command to fail silently, leading to source maps not being uploaded and resulting in un-symbolicated stack traces for production errors.

• Suggested fix: Update the documentation to use the correct, specific build directory for Hydrogen, which is dist. For example: sentry-cli sourcemaps inject ./dist.
  _{severity: 0.7, confidence: 0.9}

_{Did we get this right? 👍 / 👎 to inform future reviews.}

[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-client-array-push	10.15MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.96MB	-9 bytes (-0.0%) ⬇️

Affected Assets, Files, and Routes:

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.78MB	-0.0%
../instrumentation.js	-3 bytes	1.1MB	-0.0%
9523.js	-3 bytes	1.08MB	-0.0%

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	882.71kB	-0.0%
static/chunks/8321-*.js	-3 bytes	425.87kB	-0.0%
static/q48ge2Y6iromYpSDwJV3t/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/q48ge2Y6iromYpSDwJV3t/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/-*.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️
static/-*.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️