Fix default Rust toolchain on CI

Author: tyranron

.github/workflows/ci.yml

@@ -61,10 +61,10 @@ jobs:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: stable
+          toolchain: nightly
       - uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: stable
 
       - run: cargo +nightly update -Z minimal-versions
 
@@ -108,11 +108,10 @@ jobs:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: ${{ matrix.msrv }}
-      - run: rustup default ${{ matrix.msrv }}
+          toolchain: nightly
       - uses: dtolnay/rust-toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: ${{ matrix.msrv }}
 
       - run: cargo +nightly update -Z minimal-versions
 
@@ -131,7 +130,6 @@ jobs:
         with:
           toolchain: ${{ matrix.toolchain }}
           components: rust-src
-      - run: rustup default ${{ matrix.toolchain }}
 
       - run: cargo install cargo-careful
         if: ${{ matrix.toolchain == 'nightly' }}