[DOCS][Robotics] remove prompt indicator $ (#2390) - repeat #1484

Job	Run time
filter	31s
build-multi-modal-patient-monitoring	0s
build-edge-insights-vision	0s
build-industrial-edge-insights-multimodal	0s
build-metro-sdk-manager	0s
build-image-based-video-search	0s
build-metro-vision-ai-app-recipe	0s
build-live-video-alert-agent	0s
build-sensor-fusion-for-traffic-management	0s
build-hmi-augmented-worker	0s
build-deterministic-threat-detection	0s
build-live-video-search	0s
build-loitering-detection	0s
build-smart-route-planning-agent	0s
build-video-processing-for-nvr	0s
build-smart-tolling	0s
build-live-video-captioning	0s
build-live-metrics-service	0s
build-smart-parking	0s
build-smart-intersection	0s
build-smart-classroom	0s
build-edge-insights-time-series	0s
build-smart-traffic-intersection-agent	0s
build-visual-search-question-and-answering	0s
build-smart-nvr	0s
build-robotics-ai-suite	0s
	31s

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