create-geo-charts README has broken install URLs with [your-org] placeholder

[1x3437068787]

create-geo-charts/README.md lines 32 and 40 contain placeholder text instead of the actual GitHub organization name:

{
  "skills": [
    "https://raw.githubusercontent.com/[your-org]/gtm-engineer-skills/main/create-geo-charts/skill.md"
  ]
}

mkdir -p .claude && curl -s https://raw.githubusercontent.com/[your-org]/gtm-engineer-skills/main/create-geo-charts/skill.md -o .claude/skill-create-geo-charts.md

Both URLs will 404. The [your-org] should be onvoyage-ai.

Note: all other skill READMEs use the correct URL pattern. For example, improve-aeo-geo/README.md line 18:

claude skill add --from https://github.com/onvoyage-ai/gtm-engineer-skills/improve-aeo-geo

Additionally, the install method in create-geo-charts/README.md (manual settings.json edit + curl) differs from the claude skill add --from pattern used by all other skills in the repo. This inconsistency may confuse users who follow the same install flow across skills.