Bump julia-actions/julia-buildpkg from 1.6.0 to 1.7.0 (#1013)

Bumps [julia-actions/julia-buildpkg](https://github.com/julia-actions/julia-buildpkg) from 1.6.0 to 1.7.0.
- [Release notes](https://github.com/julia-actions/julia-buildpkg/releases)
- [Commits](julia-actions/julia-buildpkg@90dd6f2...e3eb439)

---
updated-dependencies:
- dependency-name: julia-actions/julia-buildpkg
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -134,10 +134,10 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
       - uses: julia-actions/cache@2b1bf4d8a138668ac719ea7ca149b53ed8d8401e # v2.0.7
-      - uses: julia-actions/julia-buildpkg@90dd6f23eb49626e4e6612cb9d64d456f86e6a1c # v1.6.0
+      - uses: julia-actions/julia-buildpkg@e3eb439fad4f9aba7da2667e7510e4a46ebc46e1 # v1.7.0
         with:
           project: 'examples/MyLib'
-      - uses: julia-actions/julia-buildpkg@90dd6f23eb49626e4e6612cb9d64d456f86e6a1c # v1.6.0
+      - uses: julia-actions/julia-buildpkg@e3eb439fad4f9aba7da2667e7510e4a46ebc46e1 # v1.7.0
         with:
           project: 'examples/MyLib/build'
       - run: |