Correct EESSI action version and add checkout action to examples

Author: ocaisa

README.md

@@ -21,7 +21,8 @@ jobs:
   ubuntu-minimal:
     runs-on: ubuntu-latest
     steps:
-    - uses: eessi/github-action-eessi@v4
+    - uses: actions/checkout@v4
+    - uses: eessi/github-action-eessi@v3
     - name: Test EESSI
       run: |
         module avail
@@ -38,7 +39,8 @@ jobs:
           - os: ubuntu-24.04-arm
           - os: ubuntu-24.04
     steps:
-    - uses: eessi/github-action-eessi@v4
+    - uses: actions/checkout@v4
+    - uses: eessi/github-action-eessi@v3
     - name: Test EESSI
       run: |
         module avail
@@ -51,7 +53,8 @@ jobs:
   macOS-minimal:
     runs-on: macos-latest
     steps:
-    - uses: eessi/github-action-eessi@v4
+    - uses: actions/checkout@v4
+    - uses: eessi/github-action-eessi@v3
     - name: Test EESSI
       run: |
         module avail
@@ -75,7 +78,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: eessi/github-action-eessi@v4
+    - uses: actions/checkout@v4
+    - uses: eessi/github-action-eessi@v3
     - name: Test EESSI
       run: |
         module avail
@@ -93,7 +97,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: eessi/github-action-eessi@v4
+    - uses: actions/checkout@v4
+    - uses: eessi/github-action-eessi@v3
     - name: Test EESSI
       run: |
         module load TensorFlow