docs: fix three dead links to the Cosmos SDK documentation

[boleklebovski]

Problem

Three links to the Cosmos SDK documentation are dead (404):

File	Dead link
developers/developer-guides/tools/oracles/connect/introduction.mdx	https://docs.cosmos.network/main/build/abci/vote-extensions
developers/running-nodes/manual-setup/cosmovisor.mdx	https://docs.cosmos.network/main/tooling/cosmovisor
developers/running-nodes/manual-setup/cosmovisor.mdx	https://docs.cosmos.network/v0.45/run-node/cosmovisor.html

docs.cosmos.network retired the /main/... tree and the old /v0.45/... HTML pages. Readers following the Cosmovisor setup instructions — the one page that tells a node operator how to install the tool — currently land on a 404 twice.

Change

Repointed all three at the versioned SDK docs, which are live and match the SDK version this documentation targets (the Connect page explicitly says "Cosmos SDK version 0.50"):

• https://docs.cosmos.network/sdk/v0.50/build/abci/vote-extensions
• https://docs.cosmos.network/sdk/v0.50/build/tooling/cosmovisor

I used the versioned /sdk/v0.50/... paths rather than /sdk/latest/... deliberately: latest has been reorganised and does not carry these paths, whereas v0.50 does and is the version this page describes. Each replacement URL was requested individually and returns 200.

Note that both Cosmovisor links now resolve to the same page — upstream merged the "about" and "install" content into a single Cosmovisor document, so there is no longer a separate install page to point the second link at.

Verification

• Old URLs: 404, 404, 404. New URLs: 200, 200.
• Prose re-wrapped to satisfy prettier --check (proseWrap: always, printWidth: 80), which is what npm run format:check runs in CI. Only the one line that needed it was reflowed; the long link lines are single unbreakable tokens that prettier leaves intact.

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Note

Low Risk
Documentation link updates only; no runtime, auth, or application code changes.

Overview
Fixes three broken Cosmos SDK doc URLs that returned 404 after docs.cosmos.network retired /main/... and old /v0.45/... pages.

The Connect oracle intro now points Vote Extensions at /sdk/v0.50/build/abci/vote-extensions, matching the page’s stated SDK 0.50 target. The Cosmovisor node-setup page updates both the tool link and the install instructions link to /sdk/v0.50/build/tooling/cosmovisor (upstream merged install content into one doc, so both references share the same URL). One line on the Cosmovisor page was re-wrapped for Prettier prose rules.

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