ci/nightly: Correct job name

Signed-off-by: Tomás González <[email protected]>

.github/workflows/nightly.yml

@@ -50,7 +50,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           ref: "${{ github.event.inputs.rev }}"
-      - name: Install Rust MSRV
+      - name: Install latest Rust
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: stable