Fix TypeScript compilation error with @octokit/core 7.0.6

[Copilot]

The @octokit/core 7.0.6 update introduced a compilation error because its dependency @octokit/request-error@7.1.0 uses ErrorOptions, a type only available in ES2022 library definitions.

// @octokit/request-error/dist-types/types.d.ts
export interface RequestErrorOptions extends ErrorOptions {
  // ErrorOptions is from ES2022, but tsconfig had lib: ["DOM", "ES2021"]

Changes

• Updated tsconfig.json lib from ES2021 to ES2022 to include ErrorOptions type definition
• Kept target at ES2021 for runtime compatibility

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