Minor typos

Signed-off-by: Sam Kleinman <samk@10gen.com>
Minor typo in release-note 2.2 document

Signed-off-by: Sam Kleinman <samk@10gen.com>
Minor: Python is a proper noun

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor edits to the toc yaml and uniqueDoc operator

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1371 clarify numbers of geospatial indexes allowed

Signed-off-by: Sam Kleinman <samk@10gen.com>