Update description of user privileges on UTL_FILE

[dwicinas]

Update description now that users can be granted privileges on directories.

Addresses https://enterprisedb.atlassian.net/browse/DOCS-782

[github-actions[bot]]

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[josh-heyer]

⚠Rebased - history has changed, please reset your local branch before continuing work.

[dwicinas]

@josh-heyer Sorry, but what does it mean to "reset your local branch." Besides fetching.

[josh-heyer]

Fetching will probably work, @dwicinas. If it doesn't (you get conflicts), delete the local branch and re-pull.