ci: bump ubuntu version

Github Actions breaks `check` workflow due to scheduled
Ubuntu 20.04 brownout. Ubuntu 20.04 LTS runner will be removed on
2025-04-15, see [1]. The patch bumps an Ubuntu version in
workflows.

1. actions/runner-images#11101

Author: ligurio

.github/workflows/check.yaml

@@ -11,7 +11,7 @@ jobs:
       github.event_name == 'pull_request' &&
       github.event.pull_request.head.repo.full_name != github.repository
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
       - uses: actions/checkout@v3

.github/workflows/publish.yaml

@@ -8,7 +8,7 @@ on:
 jobs:
   publish-scm-1:
     if: github.ref == 'refs/heads/master'
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v3
 
@@ -23,7 +23,7 @@ jobs:
 
   publish-tag:
     if: startsWith(github.ref, 'refs/tags/')
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       # https://github.com/luarocks/luarocks/wiki/Types-of-rocks
       - uses: actions/checkout@v3
@@ -54,7 +54,7 @@ jobs:
       github.event_name == 'push' ||
       github.event_name == 'pull_request' &&
       github.event.pull_request.head.repo.full_name != github.repository
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v3
 

.github/workflows/test.yaml

@@ -18,7 +18,7 @@ jobs:
           - "5.2"
           - "5.1"
       fail-fast: false
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v3