fix: wrong chunksize for iters < chunksize

examples/repeated_wave_propagation.jl

@@ -74,7 +74,7 @@ function repeated_wave_propagation(utx::AbstractArray{Complex{T}}, midx, domain:
             attrs(fid)["modes"] = midx
             attrs(fid)["iters"] = iters
             attrs(fid)["nchunks"] = nchunks
-            attrs(fid)["chunksize"] = chunksize
+            attrs(fid)["chunksize"] = min(chunksize, iters)
             attrs(fid)["dx"] = collect(domain.dx)
             attrs(fid)["dy"] = collect(domain.dy)
             attrs(fid)["dz"] = domain.dz