uses appropriate os/container

Author: shahadarsh

.github/workflows/tembo_release.yml

@@ -12,17 +12,20 @@ jobs:
 
   cargo_build:
     name: Cargo build
-    runs-on: ubuntu-20.04
-    container:
-      image: quay.io/tembo/muslrust:1.71.0-stable
     strategy:
       fail-fast: false
       matrix:
         include:
           - target: x86_64-apple-darwin
             asset_name: x86_64-apple
+            os: macos-latest
           - target: x86_64-unknown-linux-musl
             asset_name: x86_64-linux
+            os: ubuntu-20.04
+            container: quay.io/tembo/muslrust:1.71.0-stable
+    runs-on: ${{ matrix.os }}
+    container:
+      image: ${{ matrix.container }}
     steps:
       - name: Check out the repo
         uses: actions/checkout@v4