This is not a claim that can be evaluated as true or false. There is zero direct evidence of life on Mars, other than certain chemical signatures. However, not even alien fossils have been found.
A certain rock vaguely shaped like a human figure is no proof of alien life on Mars. If any publication says anything otherwise, they are lying.
We can also examine the specific source: a clickbait article which targets those susceptible to conspiracy theories. The article does not specifically say that aliens do in fact live on Mars, and does not offer the image as proof -- in fact, it directly states that the image is an example of pareidolia, when the human mind recognizes a vaguely-human-shaped object as human. The article, despite its poor writing and grammar, does not claim that aliens truly live on Mars.
As such, I will rate this as "Cannot be true or false".