Add reference to Chip Tool's upstream docs

[farshidtz]

Docs: https://project-chip.github.io/connectedhomeip-doc/guides/chip_tool_guide.html

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Reported from: https://canonical-matter.readthedocs-hosted.com/en/latest/how-to/chip-tool-commission-and-control/

[jpm-canonical]

https://github.com/canonical/matter-docs/blob/f580f78f3e16f96eecb4292e098e1b6f55f13ca0/how-to/chip-tool-commission-and-control.rst?plain=1#L152

In the last paragraph of the Chip Tool Commission and Control doc, we link to: https://github.com/project-chip/connectedhomeip/blob/master/docs/guides/chip_tool_guide.md#using-chip-tool-for-matter-device-testing

We can do a simple replacement of the URL to the formatted docs on Github: https://project-chip.github.io/connectedhomeip-doc/guides/chip_tool_guide.html#using-chip-tool-for-matter-device-testing

[farshidtz]

Makes sense to replace. I hadn't seen the link at the end.

[farshidtz]

Fixed via #36