Bump CI runners from ubuntu-20.04 to ubuntu-24.04

From github notification:
> The Ubuntu 20.04 runner image will be fully unsupported by April 1,
2025.
> Jobs using the ubuntu-20.04 YAML workflow label should be updated to
ubuntu-22.04, ubuntu-24.04 or ubuntu-latest.

Author: lacop11

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: ci
 on: [push]
 jobs:
   compile:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3
@@ -19,7 +19,7 @@ jobs:
       - name: Compile
         run: poetry run mypy .
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3
@@ -41,7 +41,7 @@ jobs:
   publish:
     needs: [compile, test]
     if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3

.github/workflows/tests.yml

@@ -3,7 +3,7 @@ name: Test SDK
 on: [push]
 jobs:
   compile:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3
@@ -19,7 +19,7 @@ jobs:
       - name: Compile
         run: poetry run mypy .
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
         uses: actions/checkout@v3