Update Ubuntu versions for CI

.github/workflows/approve.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   automatic-approve:
     name: Automatic Approve
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Automatic Approve
         uses: mheap/automatic-approve-action@v1.1.0

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ on:
 
 jobs:
   lint-md:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     name: Lint Markdown content
     steps:
       - name: Checkout the repository
@@ -21,7 +21,7 @@ jobs:
           config: ./.markdownlint.json
           args: ./README.md
   lint-editorconfig:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     name: Lint for editorconfig violations
     steps:
       - name: Checkout the repository
@@ -30,7 +30,7 @@ jobs:
         uses: editorconfig-checker/action-editorconfig-checker@v2
 
   lint-markdown-toc:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     name: Lint for Table of Contents
     steps:
       - name: Checkout the repository

.github/workflows/rust.yml

@@ -12,7 +12,7 @@ env:
   CARGO_TERM_COLOR: always
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master