ci(release): install wasm32-wasip1 for build.rs cross-compile

crates/hm/build.rs cross-compiles hm-plugin-docker as a wasm plugin
that gets embedded into the hm binary. Without the wasm32-wasip1
target installed, the `cargo check --workspace` in `Set version from
tag` fails with `error[E0463]: can't find crate for std`.

Same fix the examples workflow already carries — release.yml just
didn't get it. Tag the release again (or re-run the failed job from
the same SHA) and it should reach the publish step.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: markovejnovic

.github/workflows/release.yml

@@ -18,6 +18,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
+        with:
+          # crates/hm/build.rs cross-compiles hm-plugin-docker as a wasm
+          # plugin embedded into the binary, so the target must be on
+          # the toolchain for the `cargo check` in the next step.
+          targets: wasm32-wasip1
       - uses: Swatinem/rust-cache@v2
 
       - name: Set version from tag