Don't lint all targets (i.e. examples) in minimal-versions test

Since the `windows 0.58` upgrade our crate still supports `windows` all
the way back to `0.53`, but the examples use some breaking API changes
that require `0.58`.  This means, also because of using `windows` in the
public API, that it must only be paired with `gpu-allocator` on `0.58`.

.github/workflows/ci.yml

@@ -79,7 +79,7 @@ jobs:
           # allowing the 0.0.6 release to be used (but not the 1.0.0 release).
           cargo update -p malloc_buf --precise 0.0.6
       - name: Cargo clippy with minimal-versions
-        run: cargo +stable clippy --workspace --all-targets --features ${{ matrix.features }} --no-default-features -- -D warnings
+        run: cargo +stable clippy --workspace --features ${{ matrix.features }} --no-default-features -- -D warnings
 
   doc:
     name: Build documentation