Bump actions/checkout from 1.0.0 to 3.4.0 (#57)

Bumps [actions/checkout](https://github.com/actions/checkout) from 1.0.0 to 3.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...v3.4.0)

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

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

.github/workflows/InvalidationFlagger.yml

@@ -8,12 +8,12 @@ jobs:
     - uses: julia-actions/setup-julia@v1
       with:
         version: 'nightly'
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.4.0
     - uses: julia-actions/julia-buildpkg@latest
     - uses: julia-actions/julia-invalidations@v1
       id: invs_pr
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3.4.0
       with:
         ref: 'master'
     - uses: julia-actions/julia-buildpkg@latest

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
             julia-arch: x86
 
     steps:
-      - uses: actions/checkout@v1.0.0
+      - uses: actions/checkout@v3.4.0
       - uses: julia-actions/setup-julia@latest
         with:
           version: ${{ matrix.julia-version }}