README.md: bump checkout action to latest version v4 (#20)

CHANGELOG.md

@@ -47,7 +47,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
 > 7 January 2021
 
-- :bug: Fixes a small bug that occured when -q flag was supplied [`bdac073`](https://github.com/rickstaa/action-black/commit/bdac07366af31352da423f14e895e0d7d07f2ab1)
+- :bug: Fixes a small bug that occurred when -q flag was supplied [`bdac073`](https://github.com/rickstaa/action-black/commit/bdac07366af31352da423f14e895e0d7d07f2ab1)
 
 #### [v1.0.7](https://github.com/rickstaa/action-black/compare/v1.0.6...v1.0.7)
 
@@ -105,7 +105,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
 > 7 January 2021
 
-- :bug: Fixes a small bug that occured when -q flag was supplied [`bdac073`](https://github.com/rickstaa/action-black/commit/bdac07366af31352da423f14e895e0d7d07f2ab1)
+- :bug: Fixes a small bug that occurred when -q flag was supplied [`bdac073`](https://github.com/rickstaa/action-black/commit/bdac07366af31352da423f14e895e0d7d07f2ab1)
 - :bug: Fixes small regex bug [`62293f9`](https://github.com/rickstaa/action-black/commit/62293f9ee50f256463e5e8834e570fa37cd3550d)
 - :bug: Fixes small regex bug [`225e7fc`](https://github.com/rickstaa/action-black/commit/225e7fcc711d2e80c0bd740915ade2efdbdf179b)
 

README.md

@@ -22,7 +22,7 @@ jobs:
     name: runner / black formatter
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: rickstaa/action-black@v1
         with:
           black_args: ". --check"
@@ -58,7 +58,7 @@ jobs:
     name: runner / black
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Check files using the black formatter
         uses: rickstaa/action-black@v1
         id: action_black
@@ -83,15 +83,15 @@ jobs:
     name: runner / black
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Check files using the black formatter
         uses: rickstaa/action-black@v1
         id: action_black
         with:
           black_args: "."
       - name: Create Pull Request
         if: steps.action_black.outputs.is_formatted == 'true'
-        uses: peter-evans/create-pull-request@v3
+        uses: peter-evans/create-pull-request@v6
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           title: "Format Python code with psf/black push"