Update documentation for actions/checkout@v4

Signed-off-by: Sora Morimoto <sora@morimoto.io>

Author: smorimoto

README.md

@@ -48,7 +48,7 @@ jobs:
 
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set-up OCaml ${{ matrix.ocaml-compiler }}
         uses: ocaml/setup-ocaml@v2

deploy-doc/README.md

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set-up OCaml 5.0
         uses: ocaml/setup-ocaml@v2

examples.md

@@ -17,7 +17,7 @@ runs-on: ${{ matrix.os }}
 
 steps:
   - name: Checkout tree
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
 
   - name: Set-up OCaml ${{ matrix.ocaml-compiler }}
     uses: ocaml/setup-ocaml@v2
@@ -30,7 +30,7 @@ steps:
 ```yml
 steps:
   - name: Checkout tree
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
 
   - name: Set-up OCaml on Windows
     uses: ocaml/setup-ocaml@v2
@@ -52,7 +52,7 @@ steps:
 ```yml
 steps:
   - name: Checkout tree
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
 
   - name: Set opam repository url
     id: repository
@@ -82,7 +82,7 @@ package for supported patterns.
 ```yml
 steps:
   - name: Checkout tree
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
 
   - name: Set-up OCaml ${{ matrix.ocaml-compiler }}
     uses: ocaml/setup-ocaml@v2
@@ -112,7 +112,7 @@ runs-on: ubuntu-latest
 
 steps:
   - name: Checkout tree
-    uses: actions/checkout@v3
+    uses: actions/checkout@v4
 
   - name: Retrieve new lists of system packages
     run: apt-get update

lint-doc/README.md

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set-up OCaml 5.0
         uses: ocaml/setup-ocaml@v2

lint-fmt/README.md

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set-up OCaml 5.0
         uses: ocaml/setup-ocaml@v2

lint-opam/README.md

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set-up OCaml 4.14
         uses: ocaml/setup-ocaml@v2