Bump linting in CI to Rust 1.58.1

Bump the lint tests to use the current toolchain.
We don't want to use `stable` here, since that could cause CI failures
whenever a new rust version with new lints is introduced.

Signed-off-by: Jonathan Schwender <[email protected]>

Author: jschwe

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
         uses: ./.github/actions/rust-toolchain
         with:
           components: ${{ matrix.component }}
-          toolchain: 1.54.0
+          toolchain: 1.58.1
 
       - name: clippy version
         run: cargo clippy --version