build(deps): Bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/rust.yml

@@ -28,7 +28,7 @@ jobs:
         run: sed -i "s/^version\s*=\s*\".*\"/version = \"$VERSION\"/g" Cargo.toml
 
       - name: Stash Versioned Cargo.toml
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: cargofile
           path: Cargo.toml
@@ -145,7 +145,7 @@ jobs:
           overwrite: "true"
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: github-backup-${{ matrix.os }}-${{ matrix.arch }}${{ matrix.extension }}
           path: target/${{ matrix.target }}/release/github-backup${{ matrix.extension }}
@@ -227,7 +227,7 @@ jobs:
           touch "/tmp/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: image-digest-${{ env.PLATFORM_PAIR }}
           path: /tmp/digests/*