SSL certificate problem on MacOS Julia 1.12

[visr]

Noticed this test failure on CI in #202.

vsicurl access: Error During Test at /Users/runner/work/GDAL.jl/GDAL.jl/test/drivers.jl:68
  Got exception outside of a @test
  GDALError (CE_Failure, code 11):
  	CURL error: SSL certificate problem: unable to get local issuer certificate
  
  Stacktrace:
    [1] maybe_throw
      @ ~/work/GDAL.jl/GDAL.jl/src/error.jl:42 [inlined]
    [2] aftercare
      @ ~/work/GDAL.jl/GDAL.jl/src/error.jl:59 [inlined]
    [3] gdalopen(pszFilename::String, eAccess::GDAL.GDALAccess)
      @ GDAL ~/work/GDAL.jl/GDAL.jl/src/libgdal.jl:7456

It works fine in Julia 1.10.