docs(js): Update default value for deleteSourcemapsAfterUpload to true

[chargome]

ref getsentry/sentry-javascript#16867

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 10, 2025 0:02am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
develop-docs	⬜️ Ignored (Inspect)			Jul 10, 2025 0:02am

[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	9.81MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	11.9MB	-9 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	878.27kB	-0.0%
static/chunks/1831-*.js	-3 bytes	421.22kB	-0.0%
static/Um7bKARijkQM9-*.js (New)	684 bytes	684 bytes	100.0% 🚀
static/Um7bKARijkQM9-*.js (New)	77 bytes	77 bytes	100.0% 🚀
static/PA_EGTlkmGbxwdpP8t47L/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/PA_EGTlkmGbxwdpP8t47L/_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	1.67MB	-0.0%
../instrumentation.js	-3 bytes	997.28kB	-0.0%
9523.js	-3 bytes	973.22kB	-0.0%