Reword and shuffle a few things about blanket approvals

[bcr]

I'm OK with the doc side of things and I also find the exceptions here reasonable. I'll wait a bit before approval to give others time to comment.

[adamw]

articles/committers-guide/article.xml

4824 ↗

(On Diff #51001)

Let's update these examples, given that staging, USE_GMAKE, and new LIB_DEPENDS format are already completed.

For example, the blanket covers converting to new <varname>USES</varname> macros, enabling verbose builds, and switching to new ports system syntaxes.

4850 ↗

(On Diff #51001)

This section should come before the "Blanket approval does not apply" section. Otherwise it reads like this exception only applies to team ports.

[adamw]

LGTM