Boost C++ libraries need updated to 1.86.0 (at least)

[Sheargrub]

Per NOAA-OWP/ngen#913, ngen will soon require a minimum version of 1.86.0 for the Boost C++ libraries.
Should be a relatively simple switch; I just don't have the means to test it.

Relevant links:

• Boost Minimum Version NGIAB-CloudInfra#355: Equivalent issue for CloudInfra
• Update Boost C++ libraries to 1.86.0 NGIAB-CloudInfra#359: Resolving PR for CloudInfra