Fix `--directory` path in examples (#12165)
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
The examples assume that the packages are in the project root directory.
However, they are nested inside `src`, and the commands in the examples
do not work as intended.
I could not find any related issues.
## Test Plan
<!-- How was it tested? -->
I tested it by executing the commands on my terminal - Linux and Windows
(PowerShell).
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Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
