Update readme

Author: ffurrer2

README.md

@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Extract release notes
         id: extract-release-notes
         uses: ffurrer2/extract-release-notes@v1
@@ -68,7 +68,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Extract release notes
         id: extract-release-notes
         uses: ffurrer2/extract-release-notes@v1
@@ -84,7 +84,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Extract release notes
         uses: ffurrer2/extract-release-notes@v1
         with:
@@ -101,7 +101,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Extract release notes
         uses: ffurrer2/extract-release-notes@v1
         with: