Update dependency ubuntu to v26 (#23)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -79,7 +79,7 @@ jobs:
 
   format:
     name: Format
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
 
     steps:
       - name: checkout repo
@@ -97,7 +97,7 @@ jobs:
 
   deny:
     name: Deny
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
 
     steps:
       - name: checkout repo