Update CI

Author: josevalim

.github/workflows/ci-markdown.yml

@@ -3,12 +3,12 @@ name: CI for Markdown content
 on:
   push:
     branches:
-      - 'main'
+      - "main"
     paths:
-      - 'lib/**/*.md'
+      - "lib/**/*.md"
   pull_request:
     paths:
-      - 'lib/**/*.md'
+      - "lib/**/*.md"
   workflow_dispatch:
 
 jobs:
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     steps:
       - name: Check out the repository

.github/workflows/notify.yml

@@ -10,16 +10,16 @@ permissions:
 
 jobs:
   notify:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     name: Notify
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 50
       - uses: erlef/setup-beam@v1
         with:
-          otp-version: '25.0'
-          elixir-version: '1.14.0'
+          otp-version: "27.3"
+          elixir-version: "1.18.3"
       - name: Run Elixir script
         env:
           ELIXIR_FORUM_TOKEN: ${{ secrets.ELIXIR_FORUM_TOKEN }}