bump actions/checkout from 2.3.5 to 2.4.0 (via #675)

Author: dependabot[bot]

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
       matrix:
         java-version: [ '8.0.x', '11.0.x' ]
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
 
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v2

.github/workflows/publish.yml

@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
 
       - name: Set up JDK 1.8
         uses: actions/setup-java@v2

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
       - name: "Check next version"
         run: |
           expr "${{ github.event.inputs.nextVersion }}" : '[[:digit:]][[:digit:]]*\.[[:digit:]][[:digit:]]*$'
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
         with:
           token: ${{ secrets.QAMETA_CI }}