Fixed broken links in Update index.md - #1954 (#1992)

* Fixed broken links in Update index.md - #1954

* fixed spelling error in custom-pallets.md - #1981

Author: Rashmirreddy

content/md/en/docs/build/custom-pallets.md

@@ -7,7 +7,7 @@ keywords:
 The most common approach to building a custom runtime is to start with [existing pallets](/reference/frame-pallets/).
 For example, you might start building an application-specific staking pallet that uses the types exposed in existing Collective and Balances pallets, but includes custom runtime logic required by your application and its staking rules.
 
-Although [FRAME pallets](/reference/frame-pallets) provides an overview of the most common pallets, the best place to find current information about existing pallets is the [Rust API](/reference/rust-api/) documentation for crates tht use the naming convention `pallet_*`.
+Although [FRAME pallets](/reference/frame-pallets) provides an overview of the most common pallets, the best place to find current information about existing pallets is the [Rust API](/reference/rust-api/) documentation for crates that use the naming convention `pallet_*`.
 
 If you don't find a pallet that meets your needs, you can use FRAME macros to build the scaffolding for a custom pallet.
 

content/md/en/docs/quick-start/index.md

@@ -24,9 +24,9 @@ Although the parts are interrelated, each part presents information in a differe
 The **Developer journey** presents information in the form of a narrative arc:
 
 - [Learn](/learn/) covers core blockchain and Substrate concepts and operations.
-- [Install](/iinstall/) provides platorm-specific installation instructions and troubleshooting tips for installation-related issues.
+- [Install](/install/) provides platorm-specific installation instructions and troubleshooting tips for installation-related issues.
 - [Build](/build/) exposes the tools and techniques for building custom blockchain applications.
-- [Test](/tests/) highlights approaches for unit testing and benchmarking code before deploying on a test network or in a production environment.
+- [Test](/test/) highlights approaches for unit testing and benchmarking code before deploying on a test network or in a production environment.
 - [Deploy](/deploy/) describes different options for deploying nodes, how to prepare for deployment, and how to move from a test network to a production network.
 - [Maintain](/maintain/) provides general information about maintaining your network with hardware and software upgrades, managing new releases, and maintaining your infrastructure.