Update Swatinem/rust-cache action to v2.2.0 (#506)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [Swatinem/rust-cache](https://togithub.com/Swatinem/rust-cache) | action | minor | `v2.0.2` -> `v2.2.0` |

---

### Release Notes

<details>
<summary>Swatinem/rust-cache</summary>

### [`v2.2.0`](https://togithub.com/Swatinem/rust-cache/releases/tag/v2.2.0)

[Compare Source](https://togithub.com/Swatinem/rust-cache/compare/v2.1.0...v2.2.0)

-   Add new `save-if` option to always restore, but only conditionally save the cache.

### [`v2.1.0`](https://togithub.com/Swatinem/rust-cache/releases/tag/v2.1.0)

[Compare Source](https://togithub.com/Swatinem/rust-cache/compare/v2.0.2...v2.1.0)

-   Only hash `Cargo.{lock,toml}` files in the configured workspace directories.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "after 5:00 and before 6:00 every weekday" in timezone Europe/Berlin, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://app.renovatebot.com/dashboard#github/stackabletech/operator-rs).
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Author: renovate[bot]

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
           profile: minimal
           toolchain: stable
           override: true
-      - uses: Swatinem/rust-cache@b5ec9edd911d3bf82c74038b0a28791e0aa24d6f # tag=v2.0.2
+      - uses: Swatinem/rust-cache@359a70e43a0bb8a13953b04a90f76428b4959bb6 # v2.2.0
         with:
           key: udeps
       - uses: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505 # renovate: tag=v1.0.3
@@ -91,7 +91,7 @@ jobs:
           toolchain: stable
           components: clippy
           override: true
-      - uses: Swatinem/rust-cache@b5ec9edd911d3bf82c74038b0a28791e0aa24d6f # tag=v2.0.2
+      - uses: Swatinem/rust-cache@359a70e43a0bb8a13953b04a90f76428b4959bb6 # v2.2.0
         with:
           key: clippy
       - name: Run clippy action to produce annotations
@@ -119,7 +119,7 @@ jobs:
           toolchain: stable
           components: rustfmt
           override: true
-      - uses: Swatinem/rust-cache@b5ec9edd911d3bf82c74038b0a28791e0aa24d6f # tag=v2.0.2
+      - uses: Swatinem/rust-cache@359a70e43a0bb8a13953b04a90f76428b4959bb6 # v2.2.0
         with:
           key: doc
       - uses: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505 # renovate: tag=v1.0.3
@@ -142,7 +142,7 @@ jobs:
           profile: minimal
           toolchain: stable
           override: true
-      - uses: Swatinem/rust-cache@b5ec9edd911d3bf82c74038b0a28791e0aa24d6f # tag=v2.0.2
+      - uses: Swatinem/rust-cache@359a70e43a0bb8a13953b04a90f76428b4959bb6 # v2.2.0
         with:
           key: test
       - uses: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505 # renovate: tag=v1.0.3