Adding some more instructions to UPDATING_PYPI.md

Author: samrands

UPDATING_PYPI.md

@@ -18,12 +18,15 @@ You will also need a pypi account and access to the package. Domo IT/Ops can pro
 1. Increment the version inside `setup.py`
     1. Double-check this version matches what's already in Pypi
 2. Run `python3 -m build` from the `domo-python-sdk` directory
-    1. This should create a directory called dist and add two files: `pydomo-{version}-py3-none-any.whl` and `pydomo-{version}.tar.gz`.
+    1. This should create a directory called `dist` and add two files: `pydomo-{version}-py3-none-any.whl` and `pydomo-{version}.tar.gz`.
 3. Run `python3 -m twine upload --repository pypi dist/*`
     1. This will ask for your API key. Paste it in.
     2. You should see that your new version was uploaded successfully.
 4. Check Pypi to verify your version was uploaded correctly.
 5. Update `CHANGELOG.md` to include your latest changes.
+6. Delete the `dist` directory (`rm -rf dist`)
+    1. First, the `dist` directory is ignored in git (see `.gitignore`). It does not need to be saved once it's uploaded.
+    2. Second, re-running the `build` command does not remove existing files from `dist`, it only adds new ones. So if you haven't deleted the `dist` directory, and you upgrade the version and `build` again, the `dist` directory will hold both the old version and the new version. When running `twine upload` you don't want to have both versions in `dist`, hence why you should delete it now.
 
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