chore(deps): bump ubuntu from 24.04 to 26.04

Bumps ubuntu from 24.04 to 26.04.

---
updated-dependencies:
- dependency-name: ubuntu
  dependency-version: '26.04'
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -43,7 +43,7 @@ RUN target/release/setup_local_testnet
 
 #################################################################################
 
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 
 # Easier debugging within container
 ARG GRPCURL_VERSION=1.9.1