chore(deps): Bump Swatinem/rust-cache from 2.8.2 to 2.9.1 (#96)

Bumps [Swatinem/rust-cache](https://github.com/swatinem/rust-cache) from 2.8.2 to 2.9.1.
- [Release notes](https://github.com/swatinem/rust-cache/releases)
- [Changelog](https://github.com/Swatinem/rust-cache/blob/master/CHANGELOG.md)
- [Commits](https://github.com/swatinem/rust-cache/compare/779680da715d629ac1d338a641029a2f4372abb5...c19371144df3bb44fab255c43d04cbc2ab54d1c4)

---
updated-dependencies:
- dependency-name: Swatinem/rust-cache
  dependency-version: 2.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

filtermail/.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
         with:
           toolchain: nightly
           components: rustfmt
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2
       - uses: taiki-e/install-action@4a136ceac97fe29b942ff3b6c749a46c7950d853 # v2
         with:
           tool: taplo-cli
@@ -54,7 +54,7 @@ jobs:
         with:
           toolchain: ${{ matrix.toolchain }}
           components: clippy
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2
       - run: cargo clippy
         env:
           RUSTUP_TOOLCHAIN: ${{ matrix.toolchain }}
@@ -73,5 +73,5 @@ jobs:
       - uses: dtolnay/rust-toolchain@efa25f7f19611383d5b0ccf2d1c8914531636bf9 # master
         with:
           toolchain: stable
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2
       - run: cargo test