do rustup target add wasm32-unknown-unknown also for workaround-one

Author: kanarus

.github/workflows/CI.yml

@@ -33,10 +33,12 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.toolchain }}
-          targets:   x86_64-unknown-linux-gnu, wasm32-unknown-unknown
+          targets:   wasm32-unknown-unknown
       - name: WORKAROUND-FOR-nightly-2025-08-12
         if:   ${{ matrix.toolchain == 'nightly' }}
-        run:  rustup default nightly-2025-08-08
+        run:  |
+          rustup default nightly-2025-08-08
+          rustup target add wasm32-unknown-unknown
 
       - name: Cache cargo bin
         id:   cache_cargo_bin