Update CONTRIBUTING.md

Reading this document, I found 2 improvements could occur.
- a typo
- a link turn to be 404

CONTRIBUTING.md

@@ -34,10 +34,10 @@ The environment will be ready to use in a few minutes.
 
 ### Local development environment
 
-These are one time installations required to be able to test your changes locally as part of the pull request (PR) submission process.
+These are one-time installations required to be able to test your changes locally as part of the pull request (PR) submission process.
 
 1. install Go [through download](https://go.dev/doc/install) | [through Homebrew](https://formulae.brew.sh/formula/go)
-1. [install golangci-lint](https://golangci-lint.run/usage/install/#local-installation)
+1. [install golangci-lint](https://golangci-lint.run/welcome/install/#local-installation)
 
 ### Building the extension