v2.1.1 - Gemini Omni Flash corrected (official GeminiVideoOmni node, buildable)

Corrects the Gemini Omni Flash entry shipped in v2.1.0.

Fixed

• v2.1.0 got the integration wrong. It claimed there was no official Comfy partner node or template for Gemini Omni Flash. Wrong: that leaned on a stale local server (ComfyUI 0.25.1, which does not have the node yet) plus a summarized read of the templates index rather than the raw JSON. A direct read of Comfy-Org/workflow_templates confirms the official partner node GeminiVideoOmni with three shipped templates: api_google_gemini_omni_flash_t2v / _i2v / _video_edit.
• MODELS.md now documents the real buildable graphs: node I/O (model.prompt, model.images.image_1..3, model.videos.video_1..2 -> VIDEO + STRING), T2V / I2V (up to 3 reference images) / conversational video-edit, plus the third-party Anil-matcha/gemini-omni-comfyui (muapi.ai) route as an alternative. MODEL_INDEX updated. Recipe count corrected 67 -> 68, modality chart re-rendered.
• The "replaces Veo entirely" note stands: Veo templates (api_veo2_i2v, api_veo3) are still shipped, so that launch claim remains overstated.

Changed

• Cover banner chip now reads 149 models · 68 recipes (was 68 model recipes) to show the full official model library, not just the hand-written recipes. kijai (62 packs) counted separately; private/client-trained models not in the public number.