Build and scan with Go 1.26.9

govulncheck in the security job reports ten standard-library
vulnerabilities (net/http, mime/multipart, crypto/tls), all fixed in
1.26.9. The workflows pinned golang:1.26.6-bookworm.

Claude-Session: https://claude.ai/code/session_016mBLURvJoMuUEr9cB2RpUN

.gitea/workflows/ci.yaml

@@ -35,7 +35,7 @@ jobs:
       # Runs inside the toolchain image rather than installing Go per job. Note this puts
       # the job on the dind bridge, which cannot reach github.com or get.helm.sh --
       # proxy.golang.org and git.ryuvia.com are reachable, which is all this job needs.
-      image: golang:1.26.6-bookworm
+      image: golang:1.26.9-bookworm
       # act_runner destroys a job's own volumes when it finishes, so without these every
       # run re-downloads the whole module graph. The names must appear in the runner's
       # container.valid_volumes allowlist (charts/act-runner in the k8s repo); unlisted
@@ -101,7 +101,7 @@ jobs:
   security:
     runs-on: ubuntu-latest
     container:
-      image: golang:1.26.6-bookworm
+      image: golang:1.26.9-bookworm
       volumes:
         - go-mod-cache:/go/pkg/mod
         - go-build-cache:/root/.cache/go-build

.gitea/workflows/release.yaml

@@ -30,7 +30,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     container:
-      image: golang:1.26.6-bookworm
+      image: golang:1.26.9-bookworm
       volumes:
         - go-mod-cache:/go/pkg/mod
         - go-build-cache:/root/.cache/go-build
@@ -71,7 +71,7 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     container:
-      image: golang:1.26.6-bookworm
+      image: golang:1.26.9-bookworm
       volumes:
         - go-mod-cache:/go/pkg/mod
         - go-build-cache:/root/.cache/go-build