Weekly Blockchain Node Upgrades Changelog - 2025-09-18 (#680)

* Add weekly changelog for 2025-09-18

* add product updates

* small copy update to dx changelog + reorder to top

---------

Co-authored-by: Sahil Aujla <sahilaujla15@gmail.com>

Author: alchemy-bot

fern/changelog/2025-09-18.md

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+## Developer Experience
+
+Redesigned dashboard to streamline navigation between apps:
+
+* Select an app to see its metrics, services (node, wallets, rollups, webhooks, etc.), and settings.
+* Easily switch between apps with the new header.
+* All your account settings in one place: usage, billing, and more.
+
+<embed src="./media/2025-09-18/app-centric.mp4" type="video/mp4" style={{ aspectRatio: '1 / 1', width: '100%' }} />
+
+## Wallets
+
+Shipped a big docs update that includes:
+
+* [Transactions docs](https://www.alchemy.com/docs/wallets/transactions/overview) overhaul.
+  * New guides for sending parallel transactions and retrying stuck transactions.
+  * Added and improved docs for swap API and transaction batching.
+  * Enhanced Solana gas sponsorship docs.
+* Fixed and standardized broken links, slugs, and relative paths across wallets docs.
+
+## Node
+
+**Upgrades**
+
+* Aptos Testnet: Aptos [aptos-node-v1.33.1-rc](https://github.com/aptos-labs/aptos-core/releases/tag/aptos-node-v1.33.1-rc)
+* Berachain Bepolia: Reth v1.1.0, Beacond v...
+* Optimism Mainnet: Opnode op-node/v1.13.6 ([Release Notes](https://github.com/paradigmxyz/reth/releases/tag/v1.7.0)), Reth [v1.7.0](https://github.com/paradigmxyz/reth/releases/tag/v1.7.0)
+* Ronin Mainnet: Ronin [v1.1.2](https://github.com/ronin-chain/ronin/releases/tag/v1.1.2)
+* Ronin Saigon: Ronin [v1.1.2](https://github.com/ronin-chain/ronin/releases/tag/v1.1.2)
+* Rootstock Mainnet: Rootstock [REED-8.0.0](https://github.com/rsksmart/rskj/releases/tag/REED-8.0.0)
+* Rootstock Testnet: Rootstock [REED-8.0.0](https://github.com/rsksmart/rskj/releases/tag/REED-8.0.0)