Weekly Blockchain Node Upgrades Changelog - 2026-04-02 (#1175)

* Add weekly changelog for 2026-04-02

* Add repo links for Arbitrum and Starknet node upgrades

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Darius Crisan <darius.crisan@alchemy.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

content/changelog/2026-04-02.md

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+## Node
+
+**Upgrades**
+
+* Aptos Mainnet: Aptos [aptos-node-v1.42.1](https://github.com/aptos-labs/aptos-core/releases/tag/aptos-node-v1.42.1)
+* Arbitrum Sepolia: Arbitrum [v3.9.8-4624977](https://github.com/OffchainLabs/nitro/releases/tag/v3.9.8)
+* Bsc Mainnet: Geth [v1.7.2](https://github.com/bnb-chain/bsc/releases/tag/v1.7.2)
+* Polygon Mainnet: Bor [v2.7.0](https://github.com/0xPolygon/bor/releases/tag/v2.7.0)
+* Starknet Mainnet: Pathfinder [v0.22.1](https://github.com/eqlabs/pathfinder/releases/tag/v0.22.1)
+* Starknet Sepolia: Pathfinder [v0.22.1](https://github.com/eqlabs/pathfinder/releases/tag/v0.22.1)