Fix commit hash of remote actions

Author: giordano

.github/workflows/ci.yml

@@ -31,11 +31,11 @@ jobs:
               BINARYBUILDER_RUNNER: docker
               BINARYBUILDER_USE_SQUASHFS: false
     steps:
-      - uses: actions/checkout@v2
-      - uses: julia-actions/julia-buildpkg@v1.0.0
+      - uses: actions/checkout@2036a08e25fa78bbd946711a407b529a0a1204bf # v2.3.2
+      - uses: julia-actions/julia-buildpkg@9ae2dda33d6efd1a7b5d43ec7377b7d20490a51b # v1.0.0
       # - name: Setup git user
       #   run: |
       #     git config --global user.name "Binary Builder"
       #     git config --global user.email "binary.builder@julialang.org"
-      - uses: julia-actions/julia-runtest@v1.0.0
-      - uses: julia-actions/julia-processcoverage@v1.1.0
+      - uses: julia-actions/julia-runtest@642d7a4c3b5078681a278015c40232a763d3756a # v1.0.0
+      - uses: julia-actions/julia-processcoverage@033f48081796acf509d3dd406127b5b7eee3d2d3 # v1.1.0