test(ci): enforce TOML formatting with taplo 0.9.3

.github/pull_request_template.md

@@ -17,6 +17,7 @@ person(s) who reviewed your changes. This will make sure it gets re-added to the
 **Checklist**
 
 - [ ] Run `cargo fmt`.
+- [ ] Run `taplo format`.
 - [ ] Run `cargo clippy`. If applicable, add:
   - [ ] `--target wasm32-unknown-unknown`
   - [ ] `--target wasm32-unknown-emscripten`

.github/workflows/ci.yml

@@ -620,6 +620,14 @@ jobs:
           cargo fmt --manifest-path xtask/Cargo.toml -- --check
           cargo fmt --manifest-path naga/xtask/Cargo.toml -- --check
 
+      - name: Install Taplo
+        uses: uncenter/setup-taplo@v1
+        with:
+          version: "0.9.3"
+
+      - name: run `taplo fmt`
+        run: taplo format --check --diff
+
       - name: Check for typos
         uses: crate-ci/typos@v1.24.6
 

taplo.toml

@@ -0,0 +1,2 @@
+[formatting]
+indent_string = "    "