jenkins: make jellyfin pipeline shell flags POSIX-safe

services/jellyfin/oidc/Jenkinsfile

@@ -39,7 +39,7 @@ spec:
       steps {
         container('dotnet') {
           sh '''
-            set -euo pipefail
+            set -eu
             apt-get update
             apt-get install -y --no-install-recommends zip curl ca-certificates git
             WORKDIR="$(pwd)/build"
@@ -541,7 +541,7 @@ EOF
       steps {
         container('dotnet') {
           sh '''
-            set -euo pipefail
+            set -eu
             apt-get update
             apt-get install -y --no-install-recommends unzip
             WORKDIR="$(pwd)/build"
@@ -565,7 +565,7 @@ EOF
         container('dotnet') {
           withCredentials([usernamePassword(credentialsId: 'harbor-robot', usernameVariable: 'HARBOR_USERNAME', passwordVariable: 'HARBOR_PASSWORD')]) {
             sh '''
-              set -euo pipefail
+              set -eu
               WORKDIR="$(pwd)/build"
               ORAS_BIN="/usr/local/bin/oras"
               curl -sSL "https://github.com/oras-project/oras/releases/download/v${ORAS_VERSION}/oras_${ORAS_VERSION}_linux_amd64.tar.gz" | tar -xz -C /usr/local/bin oras
@@ -587,7 +587,7 @@ EOF
       }
       container('dotnet') {
         sh '''
-          set -euo pipefail
+          set -eu
           python - <<'PY'
 import os
 import urllib.request