Deprecated GHA feature

.github/workflows/ci.yml

@@ -34,7 +34,8 @@ jobs:
         run: rustup update --no-self-update stable && rustup default stable && rustup component add clippy
       - name: Get rust version
         id: rust-version
-        run: echo "::set-output name=version::$(rustc --version)"
+        run: |
+          echo "version=$(rustc --version)" >> $GITHUB_OUTPUT
       - name: Cache cargo index
         uses: actions/cache@v4
         with: