Upgrade composer/installers version

[finnlewis]

From Slack:

NikLP (c/o PopPop)
1 hour ago
I've got a dependabot msg from yesterday nudging me to upgrade composer/installers to v2, not sure how or if this differs from composer itself and if this is a sensible/necessary move for an LGD site?

[NikLP]

NB ^2 is default in the recommended-project skeleton for D10, at least on the 10.4.7 I installed yesterday.