Update CircleCI config to use Go 1.24.0

Author: openhands-agent

.circleci/config.yml

@@ -9,14 +9,14 @@ workflows:
 jobs:
   build-and-test:
     docker:
-      - image: cimg/go:1.21.5
+      - image: cimg/go:1.24.0
     steps:
       - checkout
       - run: go vet ./...
       - run: go test ./...
   govulncheck:
     docker:
-      - image: cimg/go:1.21.5
+      - image: cimg/go:1.24.0
     steps:
       - checkout
       - run: go install golang.org/x/vuln/cmd/govulncheck@latest