Heading text in layout picture for Blocks challenge is confusing

In the Challenge part of the Blocks section, for the layout image displayed the second section as:
```

(Heading 2)
(A paragraph of text)
```

It was not clear to me that this should be a h1 and not an h2. When I saw the words Heading 2, I thought that meant write a heading with h2 tag. I was able to get past the challenge by changing it to h1, but maybe it should be a little more clear somehow?

Thanks for putting this together!

Locate the Blocks section's Challenge text and the layout image description, then read the surrounding instructions to see how heading levels are presented. Clarify that the second section requires an h1 rather than an h2, and consider the issue resolved when a newcomer can distinguish the required tag from the placeholder wording.

Written by the indexing model from the issue text.