Update ci.yml

Author: pdimov

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install packages
         if: matrix.install
@@ -126,7 +126,7 @@ jobs:
     runs-on: ${{matrix.os}}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Setup Boost
         shell: cmd
@@ -214,7 +214,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-20.04, ubuntu-22.04, macos-12, macos-13, macos-11 ]
+        os: [ ubuntu-20.04, ubuntu-22.04, macos-12, macos-13, macos-14 ]
         shared: [ OFF, ON ]
 
     runs-on: ${{matrix.os}}