[Will squash] Update doc/playbook.rst

Co-authored-by: Krzysztof Findeisen <kfindeisen@users.noreply.github.com>

doc/playbook.rst

@@ -130,7 +130,7 @@ The buckets ``rubin:rubin-pp`` and ``rubin:rubin-pp-users`` are also for Prompt
 ``rubin:rubin-pp`` has notifications configured to publish to the Kafka topic ``rubin-prompt-processing``.
 
 The Ceph user ``rubin-prompt-processing`` owns the ``rubin:rubin-pp`` and ``rubin:rubin-pp-users`` buckets, and the newer Ceph user ``prompt-processing-dev`` owns the ``rubin-pp-dev`` and ``rubin-pp-dev-users`` buckets.
-We are in the process to deprecate the ``rubin-prompt-processing`` user as it has a more restrictive permission than ``prompt-processing-dev``.
+We are in the process of deprecating the ``rubin-prompt-processing`` user as it has more restrictive permissions than ``prompt-processing-dev``.
 
 The default Rubin users' setup on ``rubin-devl`` includes an AWS credential file at the environment variable ``AWS_SHARED_CREDENTIALS_FILE`` and a default profile without read permission to the prompt processing buckets.
 A separate credential for prompt processing developers as the Ceph user ``prompt-processing-dev`` (new) or ``rubin-prompt-processing`` (old) is at  `vault <https://vault.slac.stanford.edu/ui/vault/secrets/secret/show/rubin/usdf-prompt-processing-dev/s3-buckets>`_.