Disable loongarch in CI until rust-lang/rust#133249 is merged

Author: Amanieu

.github/workflows/main.yml

@@ -113,8 +113,9 @@ jobs:
           os: ubuntu-latest
         - tuple: thumbv7em-none-eabihf
           os: ubuntu-latest
-        - tuple: loongarch64-unknown-linux-gnu
-          os: ubuntu-latest
+        # Temporarily disabled until rust-lang/rust#133249 is merged.
+        #- tuple: loongarch64-unknown-linux-gnu
+        #  os: ubuntu-latest
         - tuple: wasm32-wasip1
           os: ubuntu-latest