fix(stirling-pdf): remove broken ExecStop using %n

ExecStop=/bin/kill -15 %n expands %n to the unit name, not a PID, so
/bin/kill fails to parse it and logs a spurious status=1/FAILURE on
every stop/restart. Type=simple already sends SIGTERM to the main PID
and SuccessExitStatus=143 makes that a graceful stop, so the line is
redundant and broken. Fixes #16807

install/stirling-pdf-install.sh

@@ -147,7 +147,6 @@ Group=root
 EnvironmentFile=/opt/Stirling-PDF/.env
 WorkingDirectory=/opt/Stirling-PDF
 ExecStart=/usr/bin/java -jar Stirling-PDF.jar
-ExecStop=/bin/kill -15 %n
 Restart=always
 RestartSec=10
 

tools/pve/update-apps.sh

@@ -173,11 +173,7 @@ function detect_service() {
     rm -rf "$tmpdir"
     return 1
   fi
-
-  service=$(sed -n -E 's/^[[:space:]]*export[[:space:]]+UPDATE_SCRIPT_NAME=["'"'"']?([a-zA-Z0-9._-]+).*/\1/p' "$update_file" | head -n1)
-  [[ -z "$service" ]] && service=$(sed -n -E 's/^[[:space:]]*export[[:space:]]+SCRIPT_SLUG=["'"'"']?([a-zA-Z0-9._-]+).*/\1/p' "$update_file" | head -n1)
-  [[ -z "$service" ]] && service=$(grep -oE '/ct/[a-zA-Z0-9._-]+\.sh' "$update_file" 2>/dev/null | head -n1 | sed 's|.*/ct/||; s|\.sh$||')
-
+  service=$(grep -oE '/ct/[a-zA-Z0-9._-]+\.sh' "$update_file" 2>/dev/null | head -n1 | sed 's|.*/ct/||; s|\.sh$||')
   rm -rf "$tmpdir"
 }