add multiple pallet instances page (#1127)

* add multiple pallet instances page

* Update ai/site-index

* update .ai/site-index.json

* Update content

* apply feedback, formatting, grammar

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Co-authored-by: Erin Shaben <[email protected]>

Author: brunopgalvao

.ai/categories/parachains.md

@@ -142,7 +142,7 @@ Docs: Parachains
 - [Get Started](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/develop-toolkit-parachains-spawn-chains-zombienet-get-started.md): Quickly install and configure Zombienet to deploy and test Polkadot-based blockchain networks with this comprehensive getting-started guide.
 - [Write Tests](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/develop-toolkit-parachains-spawn-chains-zombienet-write-tests.md): Write and execute tests for blockchain networks with Zombienet's DSL. Learn to evaluate metrics, logs, events, and more for robust validation.
 - [Add a Pallet to the Runtime](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/parachains-customize-runtime-add-existing-pallets.md): Learn how to include and configure pallets in a Polkadot SDK-based runtime, from adding dependencies to implementing necessary traits.
-- [Add Multiple Pallet Instances](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/parachains-customize-runtime-add-pallet-instances.md): Learn how to implement multiple instances of the same pallet in your Polkadot SDK-based runtime to create and interact with modular blockchain components.
+- [Add Multiple Pallet Instances](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/parachains-customize-runtime-add-pallet-instances.md): Learn how to implement multiple instances of the same pallet in your Polkadot SDK-based runtime, from adding dependencies to configuring unique instances.
 - [Add Smart Contract Functionality](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/parachains-customize-runtime-add-smart-contract-functionality.md): Add smart contract capabilities to your Polkadot SDK-based blockchain. Explore EVM and Wasm integration for enhanced chain functionality.
 - [Add Pallets to the Runtime](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/parachains-customize-runtime-pallet-development-add-pallet-to-runtime.md): Add pallets to your runtime for custom functionality. Learn to configure and integrate pallets in Polkadot SDK-based blockchains.
 - [Benchmarking FRAME Pallets](https://raw.githubusercontent.com/polkadot-developers/polkadot-docs/master/.ai/pages/parachains-customize-runtime-pallet-development-benchmark-pallet.md): Learn how to use FRAME's benchmarking framework to measure extrinsic execution costs and provide accurate weights for on-chain computations.