Add cargo dependency cache to the CI process

[ayushmishra2005]

Description

Types of Changes

Please select the branch type you are merging and fill in the relevant template.

• Hotfix
• Release
• Fix or Feature

Fix or Feature

Types of Changes

• Tech Debt (Code improvements)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Dependency upgrade (A change in substrate or any 3rd party crate version)

Migrations and Hooks

• This change requires a runtime migration.
• Modifies on_initialize
• Modifies on_finalize

Checklist for Fix or Feature

• Change has been tested locally.
• Change adds / updates tests if applicable.
• Changelog doc updated.
• spec_version has been incremented.
• network-relayer's events have been updated according to the blockchain events if applicable.
• All CI checks have been passed successfully

Checklist for Hotfix

• Change has been deployed to Testnet.
• Change has been tested in Testnet.
• Changelog has been updated.
• Crate version has been updated.
• spec_version has been incremented.
• Transaction version has been updated if required.
• Pull Request to dev has been created.
• Pull Request to staging has been created.
• network-relayer's events have been updated according to the blockchain events if applicable.
• All CI checks have been passed successfully

Checklist for Release

• Change has been deployed to Devnet.
• Change has been tested in Devnet.
• Change has been deployed to Qanet.
• Change has been tested in Qanet.
• Change has been deployed to Testnet.
• Change has been tested in Testnet.
• Changelog has been updated.
• Crate version has been updated.
• Spec version has been updated.
• Transaction version has been updated if required.
• All CI checks have been passed successfully