media: fix natpmpc-helper OOM and API call format

Increase memory limit 32→64Mi (apk install was hitting the 32Mi ceiling).
Fix qBittorrent setPreferences call: use form-encoded json=<string> not
json body nesting.

servers/legion/k8s/media/gluetun-qbittorrent.yaml

@@ -85,11 +85,11 @@ spec:
                   echo "$(date): Got forwarded port $PORT"
                   # Also request TCP mapping for the same port
                   natpmpc -a "$PORT" "$PORT" tcp 60 -g 10.2.0.1 >/dev/null 2>&1
-                  # Update qBittorrent listen port
+                  # Update qBittorrent listen port (form-encoded: json=<json_string>)
                   SID=$(curl -s -c /tmp/qbt.txt -X POST http://localhost:8080/api/v2/auth/login \
                     -d "username=admin&password=adminadmin" 2>/dev/null)
                   curl -s -b /tmp/qbt.txt -X POST http://localhost:8080/api/v2/app/setPreferences \
-                    -d "{\"json\":{\"listen_port\":$PORT,\"random_port\":false}}" >/dev/null 2>&1
+                    -d "json={\"listen_port\":$PORT,\"random_port\":false}" >/dev/null 2>&1
                   echo "$(date): qBittorrent listen port set to $PORT"
                 else
                   echo "$(date): NAT-PMP failed: $OUT"
@@ -98,10 +98,10 @@ spec:
               done
           resources:
             requests:
-              memory: 16Mi
+              memory: 32Mi
               cpu: 10m
             limits:
-              memory: 32Mi
+              memory: 64Mi
               cpu: 50m
 
         # qBittorrent — shares gluetun's network namespace, all traffic through VPN