ci: pin Rust toolchain to 1.87 matching rust-toolchain.toml [no-user-impact]

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: XNLLLLH <XNLLLLH@users.noreply.github.com>

Author: 3 people

.github/workflows/ci.yml

@@ -21,7 +21,9 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@1.87.0
+        with:
+          components: rustfmt, clippy
       - name: Install with dev extras
         run: |
           python -m pip install --upgrade pip

.github/workflows/extended-checks.yml

@@ -23,7 +23,9 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@1.87.0
+        with:
+          components: rustfmt, clippy
       - name: System build deps
         run: sudo apt-get update && sudo apt-get install -y libssl-dev pkg-config
       - name: Install with dev extras