Update Swatinem/rust-cache action to v1.4.0 (#121)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Adam Haglund <adam@haglund.dev>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
           default: true
 
       - name: Rust Cache
-        uses: Swatinem/rust-cache@v1.3.0
+        uses: Swatinem/rust-cache@v1
         with:
           key: build
 
@@ -67,7 +67,7 @@ jobs:
           default: true
 
       - name: Rust Cache
-        uses: Swatinem/rust-cache@v1.3.0
+        uses: Swatinem/rust-cache@v1
         with:
           key: test