ci: install correct Rust toolchain also for the release action

.github/workflows/release.yml

@@ -5,6 +5,7 @@ on:
 
 env:
   FLUTTER_VERSION: "3.24.4"
+  RUST_VERSION: "1.82.0"
   APK_BUILD_DIR: "/tmp/build"
 
 jobs:
@@ -61,6 +62,12 @@ jobs:
         with:
           flutter-version: ${{ env.FLUTTER_VERSION }}
 
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: ${{ env.RUST_VERSION }}
+
       - name: Dependencies
         working-directory: ${{ env.APK_BUILD_DIR }}/app
         run: flutter pub get