Bump actions/cache from 2.1.7 to 3 (#158)

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.7 to 3.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.7...v3)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

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

.github/workflows/main.yml

@@ -58,7 +58,7 @@ jobs:
  - name: Set up Docker Buildx
  uses: docker/setup-buildx-action@v1
  - name: Cache Docker layers
- uses: actions/cache@v2.1.7
+ uses: actions/cache@v3
  with:
  path: /tmp/.buildx-cache
  key: ${{ runner.os }}-build-x-${{ matrix.arch }}-${{ github.sha }}
@@ -105,7 +105,7 @@ jobs:
  - name: Set up Docker Buildx
  uses: docker/setup-buildx-action@v1
  - name: Cache Docker layers
- uses: actions/cache@v2.1.7
+ uses: actions/cache@v3
  with:
  path: /tmp/.buildx-cache
  key: ${{ runner.os }}-build-x-${{ github.sha }}

.github/workflows/nightly.yml

@@ -12,7 +12,7 @@ jobs:
  - name: Set up Docker Buildx
  uses: docker/setup-buildx-action@v1
  - name: Cache Docker layers
- uses: actions/cache@v2.1.7
+ uses: actions/cache@v3
  with:
  path: /tmp/.buildx-cache
  key: ${{ runner.os }}-build-x-${{ github.sha }}

.github/workflows/publish-to-dockerhub.yml

@@ -14,7 +14,7 @@ jobs:
  - name: Set up Docker Buildx
  uses: docker/setup-buildx-action@v1
  - name: Cache Docker layers
- uses: actions/cache@v2.1.7
+ uses: actions/cache@v3
  with:
  path: /tmp/.buildx-cache
  key: ${{ runner.os }}-build-x-${{ github.sha }}