Bump actions/checkout from 2 to 3

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>

.github/workflows/ci.yaml

@@ -18,7 +18,7 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
         rust: [stable, nightly]
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v3
     - name: Install ${{ matrix.rust }}
       uses: actions-rs/toolchain@v1
       with:
@@ -38,7 +38,7 @@ jobs:
     name: Lints and Docs
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v3
     - uses: actions-rs/toolchain@v1
       with:
         toolchain: stable
@@ -61,7 +61,7 @@ jobs:
     name: Wasm stuff
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v3
     - uses: actions-rs/toolchain@v1
       with:
         toolchain: nightly

.github/workflows/docs.yml

@@ -9,7 +9,7 @@ jobs:
     name: build rustdocs and put them on github pages
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v3
     - uses: actions-rs/toolchain@v1
       with:
         toolchain: stable

.github/workflows/publish-crate.yml

@@ -8,7 +8,7 @@ jobs:
   crate:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - run: cargo publish
       env:
         CARGO_REGISTRY_TOKEN: ${{ secrets.DIVVIUP_AUTOMATON_CRATES_IO_API_TOKEN }}