Updating changelog for 1.47

[erpett]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 6802910512

Warning: This coverage report may be inaccurate.

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A quick fix for this PR: rebase it; your next report should be accurate.

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.002%) to 41.569%

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Files with Coverage Reduction	New Missed Lines	%
extensions/notebook/src/book/bookTreeView.ts	1	36.91%

Totals
Change from base Build 6795074390:	-0.002%
Covered Lines:	30784
Relevant Lines:	69355

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💛 - Coveralls