Fix formatting in README.md affiliation section

[Lakshya172]

Summary

Type of change

• Bug fix
• Feature
• Documentation
• Build / CI / deployment
• Refactor (no behaviour change)

Checklist

• pnpm --dir web verify passes (generate‑check, astro check, tsc, eslint).
• pnpm --dir web test passes.
• pnpm --dir web build succeeds.
• pnpm --dir web budget passes (contrast, route budgets, evidence consistency).
• No displayed number is hand‑typed — every value resolves to a committed artifact.
• No new external origin is introduced (the CSP forbids them).
• Evidence surfaces still ship ~0 KB JavaScript.
• If real solar footage is shown, the ILLUSTRATIVE · NASA / SVS · NOT ADITYA‑L1 DATA
  watermark is present.

Scientific / integrity impact

Screenshots / evidence