use ubuntu 24 for CI (#588)

Author: molpopgen

.github/workflows/lint.yaml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v5

.github/workflows/tests.yaml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   canceller:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: cancel previous runs
         uses: styfle/cancel-workflow-action@0.12.1

.github/workflows/wheel.yaml

@@ -67,7 +67,7 @@ jobs:
             | demes parse --ms 1 -
 
   pypi_upload:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     needs: ['wheel_test']
     steps:
       - name: download wheel