Small change to the location of conda in GCP docs (#515)
Small change to the location of conda in GCP docs (#515)

The location of conda seems to have been updated in the `deeplearning-platform-release` image on Google. Here's the new location.

Here's where it is now:
```
jupyter@my-fastai-instance:~/tutorials/fastai/course-v3$ which conda
/opt/conda/bin/conda
```
fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3