ci: update checkout action

.github/workflows/automation_remove_question_label_on_comment.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event.sender.login != 'stevearc'
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions-ecosystem/action-remove-labels@v1
         with:
           labels: question

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
     name: Luacheck
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Prepare
         run: |
@@ -29,7 +29,7 @@ jobs:
     name: StyLua
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Stylua
         uses: JohnnyMorganz/stylua-action@v3
         with:
@@ -41,7 +41,7 @@ jobs:
     name: typecheck
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: stevearc/nvim-typecheck-action@v1
         with:
           path: lua
@@ -58,7 +58,7 @@ jobs:
     env:
       NVIM_TAG: ${{ matrix.nvim_tag }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install Neovim and dependencies
         run: |
@@ -72,7 +72,7 @@ jobs:
     name: Update docs
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install Neovim and dependencies
         run: |
@@ -114,7 +114,7 @@ jobs:
         with:
           release-type: simple
           package-name: oil.nvim
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: rickstaa/action-create-tag@v1
         if: ${{ steps.release.outputs.release_created }}
         with: