Remove Technical manager from about page

[TimOsahenru]

Following the recent updates to our roles, we would like to remove the Technical Manager position from our About page should reflect the leadership team structure in this page https://blackpythondevs.com/leadership/. More details -> https://github.com/BlackPythonDevs/blackpythondevs/blob/main/roles/leadership/retired-technical-manager.md

[kjaymiller]

@TimOsahenru - That is a good change. Can you also update this issue to also point to our full leadership page

[TimOsahenru]

@TimOsahenru - That is a good change. Can you also update this issue to also point to our full leadership page

done