back up to rust 1.90 to see if that fixes wasm-ld segfault

Author: pchickey

.github/workflows/ci.yaml

@@ -26,6 +26,8 @@ jobs:
     - uses: actions/checkout@master
 
     - uses: ./.github/actions/install-rust
+      with:
+        toolchain: 1.90.0
 
     - name: Install wasmtime
       uses: bytecodealliance/actions/wasmtime/setup@v1