[gh-actions] Build docs in a separate workflow

Also: run job on a case-*in*sensitive file system (^)

 ---
 (^)

 Build      00:00:11.7835715
 Docs       00:00:00.0047760   (Could not find file '/home/runner/work/Fornax.Seo/Fornax.Seo/README.MD'.)
 Total:     00:00:11.8290545
 Status:    Failure

.github/workflows/fsdocs.yml

@@ -0,0 +1,41 @@
+name: API Docs
+
+on:
+  push:
+    paths:
+      - 'docs/**'
+      - 'src/Fornax.Seo/*.fs'
+      - '.github/workflows/fsdocs.yml'
+      - 'README.md'
+    tags:
+      - '**'
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+  publish_docs:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: windows-latest
+    env:
+      DOTNET_NOLOGO: true
+      DOTNET_CLI_TELEMETRY_OPTOUT: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8.0.x'
+      - name: Build docs
+        run: .\build.cmd -e CI=true Docs
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: './site'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.github/workflows/nuget.yml

@@ -66,32 +66,3 @@ jobs:
           dotnet nuget push release\Fornax.Seo.*.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json --skip-duplicate
         env:
           CI: true
-
-  publish_docs:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    permissions:
-      contents: read
-      pages: write
-      id-token: write
-    runs-on: ubuntu-latest
-    env:
-      DOTNET_NOLOGO: true
-      DOTNET_CLI_TELEMETRY_OPTOUT: true
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-dotnet@v4
-        with:
-          dotnet-version: '8.0.x'
-      - name: Build docs
-        run: ./build -e CI=true Docs
-      - name: Setup Pages
-        uses: actions/configure-pages@v5
-      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
-        with:
-          path: './site'
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4

README.md

@@ -3,6 +3,7 @@
 [![Nuget version][]][Package host]
 [![NuGet workflow status][]][NuGet Workflow]
 [![Test workflow status][]][Test Workflow]
+[![Docs workflow status][]][Docs Workflow]
 
 A SEO meta tag generator for [Fornax](https://ionide.io/Tools/fornax.html)
 
@@ -243,6 +244,8 @@ Distributed under the terms of the [Mozilla Public License Version 2.0][].
 [NuGet workflow status]: https://github.com/rdipardo/Fornax.Seo/actions/workflows/nuget.yml/badge.svg
 [Test Workflow]: https://github.com/rdipardo/Fornax.Seo/actions/workflows/ci.yml
 [Test workflow status]: https://github.com/rdipardo/Fornax.Seo/actions/workflows/ci.yml/badge.svg
+[Docs Workflow]: https://github.com/rdipardo/Fornax.Seo/actions/workflows/fsdocs.yml
+[Docs workflow status]: https://github.com/rdipardo/Fornax.Seo/actions/workflows/fsdocs.yml/badge.svg
 
 [Fornax CLI tool]: https://github.com/ionide/Fornax
 [Mozilla Public License Version 2.0]: https://github.com/rdipardo/Fornax.Seo/blob/main/LICENSE