chore: set rust version to 1.79 in CI

Signed-off-by: peefy <[email protected]>

.github/workflows/windows_test.yaml

@@ -13,6 +13,13 @@ jobs:
         with:
           submodules: "true"
 
+      - name: Install rust nightly toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.79
+          override: true
+          components: clippy, rustfmt
+
       - name: Set up Go
         uses: actions/setup-go@v2
         with: