Space needed in the best neighbor table

### What is the problem?

In item 1 there are two typos:
```
To do that we will:
1. Use the JOIN operator to look up each Pan-STARRS obj_id for stars we are interested in
```
1. in is repeated twice
2. there is no space between the and panstarrs1_best_neighbour

### Location of problem (optional)

https://datacarpentry.org/astronomy-python/06-join.html#the-best-neighbor-table