Update actions/checkout action to v6 (#1798)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build_pull_request.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v5
@@ -38,7 +38,7 @@ jobs:
 
     steps:
       - name: Checkout pull request
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           path: master

.github/workflows/build_push.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v5
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout master branch
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: master
           path: master
@@ -208,7 +208,7 @@ jobs:
           path: release
 
       - name: Checkout Preview branch
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: "Suwayomi/Suwayomi-Server-preview"
           ref: main

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v5
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout ${{ github.ref }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.ref }}
           path: master

.github/workflows/wiki.yml

@@ -19,13 +19,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{github.repository}}
           path: ${{github.repository}}
 
       - name: Checkout Wiki
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: ${{github.repository}}.wiki
           path: ${{github.repository}}.wiki