Bump actions/checkout from 2.3.5 to 2.4.0 (#1647)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.5 to 2.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.5...v2.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

.github/workflows/build-dev.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       -
         name: Setup .NET
         uses: actions/[email protected]
@@ -35,7 +35,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       -  
         name: Setup .NET
         uses: actions/[email protected]

.github/workflows/codeql-analysis.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Checkout repository
         id: checkout_repo
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
 
       - name: Initialize CodeQL
         id: init_codeql

.github/workflows/pull-request.yml

@@ -9,7 +9,7 @@ jobs:
     steps:
       -  
         name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       -  
         name: Setup .NET
         uses: actions/[email protected]
@@ -25,7 +25,7 @@ jobs:
     steps:
       -  
         name: Checkout
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       -  
         name: Build docs
         run: |