Use rust 1.88 for cargo test CI stage

Author: dmitry-markin

.github/workflows/check.yml

@@ -91,6 +91,12 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v4
 
+      - name: Install Rust 1.88
+        run: rustup install 1.88.0-x86_64-unknown-linux-gnu
+
+      - name: Use Rust 1.88
+        run: rustup default 1.88.0-x86_64-unknown-linux-gnu
+
       - name: Rust cache
         uses: Swatinem/rust-cache@v2
         with: