FindBoost: Add support for Boost 1.86

Update the list of known versions.

Run the command

    cmake -DBOOST_DIR=/path/to/boost_1_86_0 \
      -P Utilities/Scripts/BoostScanDeps.cmake

to extract dependencies from the 1.86.0 source tree.
They are the same as 1.85's dependencies, so just update
the version check for warning about newer versions.

Fixes: #26433

Modules/FindBoost.cmake

@@ -1410,7 +1410,7 @@ function(_Boost_COMPONENT_DEPENDENCIES component _ret)
       set(_Boost_THREAD_DEPENDENCIES chrono atomic)
       set(_Boost_WAVE_DEPENDENCIES filesystem serialization thread chrono atomic)
       set(_Boost_WSERIALIZATION_DEPENDENCIES serialization)
-      if(Boost_VERSION_STRING VERSION_GREATER_EQUAL 1.86.0 AND NOT Boost_NO_WARN_NEW_VERSIONS)
+      if(Boost_VERSION_STRING VERSION_GREATER_EQUAL 1.87.0 AND NOT Boost_NO_WARN_NEW_VERSIONS)
         message(WARNING "New Boost version may have incorrect or missing dependencies and imported targets")
       endif()
     endif()
@@ -1685,7 +1685,7 @@ else()
   # _Boost_COMPONENT_HEADERS.  See the instructions at the top of
   # _Boost_COMPONENT_DEPENDENCIES.
   set(_Boost_KNOWN_VERSIONS ${Boost_ADDITIONAL_VERSIONS}
-    "1.85.0" "1.85" "1.84.0" "1.84"
+    "1.86.0" "1.86" "1.85.0" "1.85" "1.84.0" "1.84"
     "1.83.0" "1.83" "1.82.0" "1.82" "1.81.0" "1.81" "1.80.0" "1.80" "1.79.0" "1.79"
     "1.78.0" "1.78" "1.77.0" "1.77" "1.76.0" "1.76" "1.75.0" "1.75" "1.74.0" "1.74"
     "1.73.0" "1.73" "1.72.0" "1.72" "1.71.0" "1.71" "1.70.0" "1.70" "1.69.0" "1.69"