Remove nightly from CI

Author: VladasZ

.github/workflows/build_with_tests.yml

@@ -19,8 +19,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: nightly
       - run: cargo install cargo-kotars --git https://github.com/JetpackDuba/kotars
       - name: Set up JDK 17
         uses: actions/setup-java@v3

.github/workflows/release.yml

@@ -11,8 +11,6 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: nightly
       - run: cargo install cargo-kotars --git https://github.com/JetpackDuba/kotars
       - run: cargo install cross
       - name: Set up JDK 17
@@ -48,7 +46,6 @@ jobs:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: nightly
           targets: aarch64-unknown-linux-gnu
       - run: cargo install cargo-kotars --git https://github.com/JetpackDuba/kotars
       - run: cargo install cross
@@ -86,8 +83,6 @@ jobs:
         run: echo ${{github.ref_name}}
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: nightly
       - run: cargo install cargo-kotars --git https://github.com/JetpackDuba/kotars
       - name: Set up JDK 17
         uses: actions/setup-java@v3
@@ -131,7 +126,6 @@ jobs:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: nightly
           targets: x86_64-apple-darwin
       - run: cargo install cargo-kotars --git https://github.com/JetpackDuba/kotars
       - name: Set up JDK 17