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>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
       github.event_name == 'push' || github.event_name == 'schedule'
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Determine NGINX Plus version
         run: echo "NGINX_PLUS_VERSION=$(cat Makefile | grep -m1 NGINX_PLUS_VERSION | cut -d "=" -f2)" >> $GITHUB_ENV
       - name: Switch Repository (Nightly)

.github/workflows/codeql-analysis.yml

@@ -35,7 +35,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/fossa.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Scan
         uses: fossas/fossa-action@v1
         with:

.github/workflows/lint.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Output Variables
         id: vars
         run: echo "::set-output name=go_version::$(grep "go 1." go.mod | cut -d " " -f 2)"