docs: Updated telemetry

[kirit93]

Updated telemetry on readme

[greptile-apps]

Greptile Summary

This PR performs a routine monthly telemetry update for the DataDesigner README, refreshing the token-generation badge, the top-models chart date range, the "Last updated" timestamp, and the chart image itself.

• Updated tokens-generated badge from 150+ Billion to 250+ Billion
• Shifted the telemetry reporting window from 1/24/2026–2/24/2026 to 2/23/2026–3/23/2026
• Updated the "Last updated" date to 3/23/2026, which is consistent with today's date and the new end of the reporting window
• Replaced docs/images/top-models.png with a new chart reflecting the updated period

No code logic, APIs, or runtime behavior are affected. All three text changes are mutually consistent.

Confidence Score: 5/5

• This PR is safe to merge — it is a purely cosmetic documentation update with no code changes.
• All changes are limited to README text and a PNG image. The date range, "Last updated" timestamp, and token-count badge are internally consistent and match the current date. There are no logic, security, or runtime concerns.
• No files require special attention.

Important Files Changed

Filename	Overview
README.md	Updated telemetry badge (150B → 250B tokens), refreshed chart date range to 2/23/2026–3/23/2026, and updated "Last updated" timestamp to 3/23/2026. All changes are internally consistent.
docs/images/top-models.png	Binary image replaced with updated chart reflecting the new reporting period (2/23/2026–3/23/2026).

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Monthly Telemetry Collection\n2/23/2026 – 3/23/2026] --> B[Generate top-models.png\nChart]
    B --> C[Update README.md]
    C --> D1[Badge: 250+ Billion\nTokens Generated]
    C --> D2[Chart date range:\n2/23/2026 – 3/23/2026]
    C --> D3[Last updated:\n3/23/2026]

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_{Reviews (2): Last reviewed commit: "Updated Badge" | Re-trigger Greptile}