build(deps): bump actions/checkout from 2 to 3 (#186)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  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>

Author: dependabot[bot]

.github/workflows/nix.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Install nix
       uses: cachix/install-nix-action@v16
       with:

.github/workflows/rust.yml

@@ -28,7 +28,7 @@ jobs:
     name: Build scherzo
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         submodules: true
 
@@ -71,7 +71,7 @@ jobs:
     name: Build release binaries
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         submodules: true
 
@@ -121,7 +121,7 @@ jobs:
     if: github.event_name == 'push'
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: 'harmony-development/ansible'
       - run: 'echo "$SSH_KEY" > key && chmod 600 key'