fix: Pin to Rust 1.88 for now

Author: marc2332

.github/workflows/publish.yml

@@ -14,6 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+        with:
+            toolchain: "1.88"
       - run: cargo publish
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}