ci(test): Replace --all with --workspace

According to `cargo test --help`, `--all` is a deprecated alias to `--workspace`.

Author: szokeasaurusrex

.github/workflows/test.yml

@@ -35,4 +35,4 @@ jobs:
         uses: swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # 2.8.0
 
       - name: Run Cargo Tests
-        run: cargo test --all
+        run: cargo test --workspace