Tried adding in the toolchain to the GA

It appears the github actions is failing setting up the Rust toolchain
and it's complaining about the lack of toolchain, which per the docs,
should be something like stable, nightly, etc.

.github/workflows/release.yml

@@ -23,10 +23,12 @@ jobs:
           - build: macos
             os: macos-latest
             target: x86_64-apple-darwin
+            toolchain: stable
 
           - build: macos-arm
             os: macos-latest
             target: aarch64-apple-darwin
+            toolchain: stable
 
           #- build: windows-gnu
           #  os: windows-latest
@@ -35,10 +37,12 @@ jobs:
           - build: windows-msvc
             os: windows-latest
             target: x86_64-pc-windows-msvc
+            toolchain: stable
 
           - build: linux
             os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
+            toolchain: stable
 
     steps:
       - name: Checkout repository