Add weekly changelog for 2025-11-27

Author: alchemy-bot

fern/changelog/2025-11-27.md

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+## Node
+
+**Upgrades**
+
+* Polygon Amoy: Erigon [v3.3.1-beta3](https://github.com/0xPolygon/erigon/releases/tag/v3.3.1-beta3), Bor [v2.5.2-beta2](https://github.com/maticnetwork/bor/releases/tag/v2.5.2-beta2), Heimdall [v0.5.1-beta](https://github.com/0xPolygon/heimdall-v2/releases/tag/v0.5.1-beta)
+* Unichain Mainnet: Op Node op-node/v1.16.2
+* Worldchain Mainnet: Op Reth v1.9.3