[CI] update ubuntu image

# Why

Semaphore removed ubuntu2004

# WHat changed

Bump to 2404

# Test 

CI passes

Author: pacharrin

.semaphore/semaphore.yml

@@ -3,7 +3,7 @@ name: replit-storage-python
 agent:
   machine:
     type: e1-standard-4
-    os_image: ubuntu2004
+    os_image: ubuntu2404
 blocks:
   - name: install deps
     task:
@@ -47,4 +47,4 @@ blocks:
           commands:
             - make test-unit
     dependencies:
-      - install deps
+      - install deps