Try to fix CI by downgrading the ESP-RS toolchain

Author: ivmarkov

.github/workflows/ci.yml

@@ -44,7 +44,6 @@ jobs:
         with:
           default: true
           version: "1.69.0"
-          buildtargets: ${{ matrix.target }}
 
       - name: Build | Fmt Check
         run: cargo fmt -- --check