Bump ubuntu from 25.04 to 26.04

Bumps ubuntu from 25.04 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

@@ -1,5 +1,5 @@
 # Use the latest version of the Ubuntu image with a specific tag for stability
-FROM ubuntu:25.10
+FROM ubuntu:26.04
 
 # Set the maintainer of the image
 LABEL maintainer="UDX CAG Team"