[Pijukatel]

Syncs the Go client to OpenAPI spec v2-2026-10-26T112451Z (apify/apify-docs#3092, #3027, #3106, #3095, #3115) and checks reference client change apify/apify-client-js#1171. None of these changes request or response shapes the client models, so this is a docs and version update. Client version goes from 0.13.0 to 0.13.1.

• APISpecVersion and ClientVersion are bumped in version.go and the README, with a CHANGELOG entry.
• #3027: RunClient.Resurrect docs in run.go and docs/runs.md now list the statuses that can be resurrected (SUCCEEDED, FAILED, ABORTED, TIMED-OUT).
• #3092 and JS #1171 add requestId to the charge request. The client already sends it as RunChargeOptions.RequestID (since 0.13.0).
• #3115 adds optional ActorDefinition fields, which appear only in Build.actorDefinition. Build already passes unmodelled fields through Extra, so no typed fields are added.
• #3095 and #3106 change description and link text only.
• Comment fixes: the IterateDatasetItems godoc and the matching test comment no longer claim iteration depends on the X-Apify-Pagination-Total header, and a garbled sentence in the newSingleContext comment is fixed.

Unit tests, live-API integration tests (including doc snippets and examples), go vet and golangci-lint pass locally.