Bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/bootstrap.yml

@@ -58,7 +58,7 @@ jobs:
         run: |
           _build/bin/cabal --version
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: cabal-${{ matrix.os }}-${{ matrix.ghc }}-bootstrapped
           path: _build/artifacts/*

.github/workflows/users-guide.yml

@@ -73,7 +73,7 @@ jobs:
       run: |
         make SPHINX_HTML_OUTDIR=html users-guide
 
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v5
       with:
         name: users-guide-html
         path: html/

.github/workflows/validate.yml

@@ -219,7 +219,7 @@ jobs:
       # - Make it available in the workflow to make easier testing it locally
       - name: Upload cabal-install executable to workflow artifacts
         if: matrix.ghc == env.GHC_FOR_RELEASE
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: cabal-${{ runner.os }}-${{ env.CABAL_ARCH }}
           path: ${{ env.CABAL_EXEC_TAR }}
@@ -378,7 +378,7 @@ jobs:
           echo "CABAL_EXEC_TAR=$CABAL_EXEC_TAR" >> "$GITHUB_ENV"
 
       - name: Upload cabal-install executable to workflow artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: cabal-${{ runner.os }}-static-x86_64
           path: ${{ env.CABAL_EXEC_TAR }}