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] <[email protected]>

Author: dependabot[bot]

.github/workflows/artifact.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - uses: actions-rs/toolchain@v1
       with:

.github/workflows/audit.yaml

@@ -12,7 +12,7 @@ jobs:
   security_audit:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: Swatinem/rust-cache@v1
       # cannot use, because no support for work dirs yet:
       # - uses: actions-rs/audit-check@v1

.github/workflows/codeql-analysis.yml

@@ -41,7 +41,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/dependabot-auto-merge.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-20.04
     if: github.actor == 'dependabot[bot]'
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: ahmadnassri/action-dependabot-auto-merge@v2
         with:
           target: patch

.github/workflows/release.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - uses: actions-rs/toolchain@v1
       with: