Migrate to setup-just for faster installation

Signed-off-by: Wiktor Kwapisiewicz <wiktor@metacode.biz>

Author: wiktor-k

.github/workflows/rust.yml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - run: cargo install --locked just
+      - uses: wiktor-k/setup-just@v1
       - run: rustup install nightly
       - run: rustup component add rustfmt --toolchain nightly
       - name: Check formatting
@@ -49,7 +49,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - run: cargo install --locked just
+      - uses: wiktor-k/setup-just@v1
       - name: Run unit tests
         run: just tests
 
@@ -79,6 +79,6 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - run: cargo install --locked just
+      - uses: wiktor-k/setup-just@v1
       - name: Check for lints
         run: just lints