[U] Only build on release

Removed push and pull_request triggers from workflow.

.github/workflows/test.yml

@@ -0,0 +1,31 @@
+name: Test
+
+"on":
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: Cargo test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Rust builds
+        uses: Swatinem/rust-cache@v2
+
+      - name: Test
+        run: cargo test --locked