fix(SUP-42158): German translation for Player V7 (#876)

Added translation in German to "Seek 10 seconds backwards/forward"

Resolves SUP-42158

Author: Tzipi-kaltura

translations/de.i18n.json

@@ -8,7 +8,9 @@
       "fullscreen": "Vollbild",
       "fullscreenExit": "Vollbild beenden",
       "rewind": "Zurückspulen",
+      "secondsRewind": "{{seconds}} Sekunden zurückspulen",
       "forward": "Vorspulen",
+      "secondsForward": "{{seconds}} Sekunden vorspulen",
       "vrStereo": "vrStereo",
       "closedCaptionsOn": "Untertitel deaktivieren",
       "closedCaptionsOff": "Untertitel aktivieren",