Update dependency ubuntu to v26

.github/workflows/beest-verification.yml

@@ -41,7 +41,7 @@ concurrency:
 jobs:
   trigger:
     name: Trigger beest process-agent verification
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     permissions: {}
     steps:

.github/workflows/cerberus-notify.yml

@@ -18,7 +18,7 @@ permissions: {}
 jobs:
   notify:
     name: Notify Slack via Cerberus
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - name: Post the failure to Cerberus

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ env:
 jobs:
   workflow-security-lint:
     name: Workflow security lint (Zizmor)
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     permissions:
       contents: read
@@ -310,7 +310,7 @@ jobs:
       github.event.pull_request.head.repo.full_name == github.repository) ||
       ((github.event_name == 'push' || github.event_name == 'workflow_dispatch') &&
       github.ref == 'refs/heads/master')
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     permissions:
       contents: read
       id-token: write
@@ -342,7 +342,7 @@ jobs:
       - publish-image
       - merge-multiarch-manifest
     if: always()
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     permissions: {}
     steps:
       - name: Verify all required jobs succeeded

Dockerfile

@@ -2,7 +2,7 @@
 # Actual docker image construction #
 ####################################
 
-FROM ubuntu:jammy-20261020@sha256:076e7bf82319619f28dd0aa9c02ab34b055ad37100395b4f49a2ffba04fb5e11
+FROM ubuntu:26.04@sha256:6a06111c3b0a8600feadb270aec771dc239bf407b25625f93f44ab00e11f4d3c
 LABEL maintainer="StackState <info@stackstate.com>"
 ARG LONG_ARCH="x86_64"
 ARG SHORT_ARCH="amd64"

test-server/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:24.04@sha256:fe81560990fae86dc4743202b2cb4d3df98d0bcf949173cecef15ce1127ef852
+FROM ubuntu:26.04@sha256:6a06111c3b0a8600feadb270aec771dc239bf407b25625f93f44ab00e11f4d3c
 
 COPY main /
 COPY config.json /