[schema first] Language server won't auto reload after the schema SDL file updated

## Actual Behavior

Updating the schema SDL file won't trigger language server reload. As the
result, auto-completion kind of function doesn't work for the documents kind
of graphql file. After manually reload the language server, everything works fine.

## Expected Behavior

Language server should reload automatically, once the schema.graphql file is
updated.

## Steps to Reproduce the Problem Or Description

## Specifications

- GraphQL for VSCode Extension Version: 0.3.33
- VSCode Version: 1.62.3
- OS Name: Windows 11
- OS Version: 10.0.22000
- graphql config filename and format example: .graphqlrc.yaml

## Logs Of TS Server || GraphQL Language Service