docs: add node101 to private RPC providers

[girginomer10]

Adds node101 to the private RPC provider table, following the invitation in #1701. The entry links to the node101 Linea service page and marks Linea API methods and WebSocket support.

The node101 team confirmed support for linea_estimateGas on 25 September 2026. WebSocket support is also documented on the service page. The Linea-specific capability is based on provider confirmation, not an independently executed endpoint test.

Validation

• npm run lint and npm run typecheck: passed during preparation; the follow-up only replaces the verification marker with the existing supported-value notation.
• npm run build: passed on the final row, including generated Markdown documentation.
• npm run agent-docs:check: passed.
• Browser preview: checked the node101 row and destination link during preparation; final built HTML checked for both support indicators.
• git diff --check: passed; final PR scope is one file, five added lines.
• Validation used Node 24.19.0; the repository pins 24.18.0.

Related to #1701. Submitted on behalf of node101. This adds only the private-provider entry; it does not add a public endpoint.

[vercel]

@girginomer10 is attempting to deploy a commit to the Consensys Incorporated Team on Vercel.

A member of the Team first needs to authorize it.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.