docs: fix website broken links (golangci#4518)

Author: alexandear

docs/src/docs/contributing/workflow.mdx

@@ -51,7 +51,7 @@ Also, we run a few checks in CI by using GitHub actions, you can see them [here]
 
 ## New releases
 
-First, see [our versioning policy](/usage/install/#versioning-policy).
+First, see [our versioning policy](/product/roadmap/#versioning-policy).
 
 To make a new release create a tag `vx.y.z`. Don't forget to add zero patch version for a new minor release, e.g. `v1.99.0`.
 A GitHub action [workflow](https://github.com/golangci/golangci-lint/blob/master/.github/workflows/tag.yml) will start building and publishing release after that.

docs/src/docs/index.mdx

@@ -20,14 +20,14 @@ Follow the news and releases on our twitter <IconContainer color="#1DA1F2"><FaTw
 
 ## Features
 
-- ⚡ [Very fast](/usage/performance): runs linters in parallel, reuses Go build cache and caches analysis results.
+- ⚡ [Very fast](/product/performance): runs linters in parallel, reuses Go build cache and caches analysis results.
 - ⚙️ YAML-based [configuration](/usage/configuration).
-- 🖥 [Integrations](/usage/integrations) with VS Code, Sublime Text, GoLand, GNU Emacs, Vim, Atom, GitHub Actions.
+- 🖥 [Integrations](/welcome/integrations) with VS Code, Sublime Text, GoLand, GNU Emacs, Vim, Atom, GitHub Actions.
 - 🥇 [A lot of linters](/usage/linters) included, no need to install them.
 - 📈 Minimum number of [false positives](/usage/false-positives) because of tuned default settings.
 - 🔥 Nice output with colors, source code lines and marked `identifiers`.
 
-[Get started now!](/usage/install)
+[Get started now!](/welcome/install)
 
 ## Demo
 
@@ -36,7 +36,7 @@ Follow the news and releases on our twitter <IconContainer color="#1DA1F2"><FaTw
 Short 1.5 min video demo of analyzing [beego](https://github.com/astaxie/beego).
 [![asciicast](https://asciinema.org/a/183662.svg)](https://asciinema.org/a/183662)
 
-[Get started now!](/usage/install)
+[Get started now!](/welcome/install)
 
 ## License Scan
 

docs/src/docs/welcome/faq.mdx

@@ -10,7 +10,7 @@ The same as the Go team (the 2 latest minor versions).
 
 Run `golangci-lint` in CI and check the exit code. If it's non-zero - fail the build.
 
-See [how to properly install `golangci-lint` in CI](/usage/install#ci-installation)
+See [how to properly install `golangci-lint` in CI](/welcome/install/#ci-installation)
 
 ## `golangci-lint` doesn't work
 

docs/src/docs/welcome/install.mdx

@@ -126,4 +126,4 @@ go install github.com/golangci/golangci-lint/cmd/golangci-lint@{.LatestVersion}
 
 ## Next
 
-[Quick Start: how to use `golangci-lint`](/usage/quick-start).
+[Quick Start: how to use `golangci-lint`](/welcome/quick-start/).

docs/src/docs/welcome/integrations.mdx

@@ -80,4 +80,4 @@ See the instructions on `golangci-lint completion <YOUR_SHELL> --help` (replace
 
 ## CI Integration
 
-See our [GitHub Action](/usage/install#github-actions).
+See our [GitHub Action](/welcome/install/#github-actions).