conda/analysis3-25.05 soon to be deprecated in postscript.sh

[aekiss]

postscript.sh now issues this warning

The environment 'conda/analysis3-25.05' is more than 8 months old.
It will soon be deprecated. Please move to a newer 'conda/analysis3' environment.

I think

module load conda/analysis3

would be better here (future-proof), rather than using a specific version

om3-scripts/payu_config/postscript.sh

Line 17 in fd6998c

module load conda/analysis3-25.05

[aekiss]

there are a few other comments that could be updated similarly