Update dev tools docs

- Covalent
- Subquery

Author: hsutaiyu

docs/tools/data/covalent.md

@@ -9,22 +9,21 @@
 
 ## Supported endpoints
 
-All [__Class A__](https://www.covalenthq.com/docs/api/#tag--Class-A) endpoints are supported for the Matic mainnet and the Mumbai testnet. You can query either network via the unified API by changing the `chainId`.
+All [__Class A__](https://www.covalenthq.com/docs/api/#tag--Class-A) endpoints are supported for the Matic mainnet and the Amoy testnet. You can query either network via the unified API by changing the `chainName`.
 
 !!! info "Endpoints"
 
     A full list of all the requests you are able to do on the Polygon network using Covalent are available on the [Covalent API documentation](https://www.covalenthq.com/docs/api/).
 
 ## Appendix
 
-### Matic gas token
+### MATIC gas token
 
-To interact with the Matic network, MATIC tokens are required to pay as gas fees. Covalent's
-responses automatically returns `gas_*` fields in the MATIC units.
+To interact with Polygon network, MATIC tokens are required to pay gas fees. Covalent's responses automatically return `gas_*` fields in MATIC units.
 
 ### Token mapping
 
-Covalent maintains an on-chain real-time mapping of token addresses between the Ethereum mainnet and the Matic chain. These addresses are used to reverse-lookup prices on Matic and also to return the right token logo URLs.
+Covalent maintains an on-chain real-time mapping of token addresses between the Ethereum mainnet and Polygon. These addresses are used to reverse-lookup prices on MATIC and also to return the right token logo URLs.
 
 Some example of mapped tokens:
 

docs/tools/data/subquery.md

@@ -8,7 +8,7 @@ SubQuery is a leading blockchain data indexer that provides developers with fast
 
 Another one of SubQuery's competitive advantages is the ability to aggregate data not only within a chain but across multiple blockchains all within a single project. This allows the creation of feature-rich dashboard analytics and multi-chain block scanners.
 
-Other advantages include superior performance with multiple RPC endpoint configurations, multi-worker capabilities and a configurable caching architecture. To find out more, visit our [documentation](https://academy.subquery/).
+Other advantages include superior performance with multiple RPC endpoint configurations, multi-worker capabilities and a configurable caching architecture. To find out more, visit our [documentation](https://academy.subquery.network/).
 
 **Useful resources**: