Fix notebook links in analysis_1.ipynb
"cell_type": "markdown",
"metadata": {},
"source": [
- "To see how to explore observations, please refer to the following notebook: [CTA with Gammapy](cta.html) or [HESS with Gammapy](hess.html) "
+ "To see how to explore observations, please refer to the following notebook: [CTA with Gammapy](cta.ipynb) or [HESS with Gammapy](hess.ipynb) "
]
},
{
