Merge pull request #3868 from DataDog/ivoanjo/fix-valgrind-install

[NO-TICKET] Fix stale apt cache in memory leaks CI test

.github/workflows/test-memory-leaks.yaml

@@ -11,7 +11,7 @@ jobs:
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
           bundler: latest
           cache-version: v1 # bump this to invalidate cache
-      - run: sudo apt install -y valgrind && valgrind --version
+      - run: sudo apt update && sudo apt install -y valgrind && valgrind --version
       - run: bundle exec rake compile spec:profiling:memcheck
   test-asan:
     runs-on: ubuntu-24.04