Update ubuntu in CI runners

Author: tompave

.github/workflows/quality.yml

@@ -13,7 +13,7 @@ env:
 jobs:
   credo:
     name: Credo
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false

.github/workflows/test.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   build:
     name: Elixir ${{ matrix.elixir }} with OTP ${{ matrix.otp }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false