ci: bump actions/attest-build-provenance from 3 to 4

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 3 to 4.
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](https://github.com/actions/attest-build-provenance/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/appimage-build.yml

@@ -308,7 +308,7 @@ jobs:
 
       - name: Attest AppImage (Build Provenance)
         if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@v4
         with:
           subject-path: Zoitechat-*-x86_64.AppImage
 

.github/workflows/flatpak-build.yml

@@ -46,6 +46,6 @@ jobs:
 
       - name: Attest Flatpak Bundle (Build Provenance)
         if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@v4
         with:
           subject-path: zoitechat.flatpak

.github/workflows/windows-build.yml

@@ -229,7 +229,7 @@ jobs:
 
       - name: Attest Installer (Artifact Attestation)
         if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@v4
         with:
           subject-name: Installer ${{ matrix.arch }}
           subject-digest: sha256:${{ steps.upload_installer.outputs.artifact-digest }}
@@ -243,7 +243,7 @@ jobs:
 
       - name: Attest Build Files (Artifact Attestation)
         if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@v4
         with:
           subject-name: Build Files ${{ matrix.arch }}
           subject-digest: sha256:${{ steps.upload_buildfiles.outputs.artifact-digest }}

.github/workflows/windows-msi-build.yml

@@ -407,7 +407,7 @@ jobs:
 
       - name: Attest MSI Installer (Artifact Attestation)
         if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@v4
         with:
           subject-name: MSI Installer ${{ matrix.arch }}
           subject-digest: sha256:${{ steps.upload_msi.outputs.artifact-digest }}
@@ -422,7 +422,7 @@ jobs:
 
       - name: Attest MSIX Package (Artifact Attestation)
         if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-        uses: actions/attest-build-provenance@v3
+        uses: actions/attest-build-provenance@v4
         with:
           subject-name: ${{ steps.build_msix.outputs.artifact_name }}
           subject-digest: sha256:${{ steps.upload_msix.outputs.artifact-digest }}