Github action: checkout v4

Author: OdysseusLives

.github/workflows/nebula-ci.yml

@@ -16,7 +16,7 @@ jobs:
         java: [ 8 ]
     name: CI with Java ${{ matrix.java }}
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Setup jdk
         uses: actions/setup-java@v1
         with:

.github/workflows/nebula-publish.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Setup jdk 8
         uses: actions/setup-java@v1
         with:

.github/workflows/nebula-snapshot.yml

@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up JDK