* docs: Update CI Badge Branch Name
The CI badges were still pointing at builds for the master branch, which
are stale since the rename to main.
* docs: Update electron/electron Branch Name
Update electron/electron branch name from master to main.
* docs: Update electron/governance Branch Name
Update electron/governance branch name from master to main.
removes an outdated reference to Node Security Project, which was acquired by npm some time ago. The new workflow for the same process (now the npm advisories page) has been added.
