MINOR: Add Apache Impala to the ORC adopters page (#1106)
MINOR: Add Apache Impala to the ORC adopters page (#1106)

### What changes were proposed in this pull request?

Add Apache Impala to the ORC [adopters page](https://orc.apache.org/docs/adopters.html)

### Why are the changes needed?

Make the page up-to-date.

### How was this patch tested?

Manually review.
apache/orc,apache/orc,apache/orc,apache/orc,apache/orc,apache/orc,apache/orc,apache/orc