refactor: change to vars.RUST_TOOLCHAIN for rust ci (#861)

* Update docker.yml

* Update ci.yml

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.73.0
+          toolchain: ${{ vars.RUST_TOOLCHAIN }}
 
       - name: Sccache cache
         uses: mozilla-actions/sccache-action@v0.0.3
@@ -69,10 +69,8 @@ jobs:
         include:
           - os: macos-latest
             target: aarch64-apple-darwin
-            toolchain: 1.73.0
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
-            toolchain: 1.73.0
 
     env:
       SCCACHE_GHA_ENABLED: true
@@ -88,11 +86,11 @@ jobs:
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: ${{ matrix.toolchain }}
+          toolchain: ${{ vars.RUST_TOOLCHAIN }}
           target: ${{ matrix.target }}
           components: clippy
 
-      - run: rustup default ${{ matrix.toolchain }}
+      - run: rustup default ${{ vars.RUST_TOOLCHAIN }}
 
       - name: Sccache cache
         uses: mozilla-actions/sccache-action@v0.0.3

.github/workflows/docker.yml

@@ -101,8 +101,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: ${{ steps.cache.outputs.cache-from }}
           cache-to: ${{ steps.cache.outputs.cache-to }}
-          build-args: |
-            RUST_TOOLCHAIN=1.73.0
+          build-args: RUST_TOOLCHAIN=${{ vars.RUST_TOOLCHAIN }}
 
       - name: Docker Hub Description
         uses: peter-evans/dockerhub-description@v3