test no longer for sage 9.1, add test for sage 9.8

[fchapoton]

Let us see if everything is fine with the latest sage.

Sage 9.1 is too old now.

[fchapoton]

sadly, sage 9.8 is not yet available on docker hub

[NathanDunfield]

@fchapoton First, many thanks for getting updated SageMath docker images created. As I followed that thread in sage-devel, I added 9.8 and 10.0 in 2bcf50b. Is ghcr.io/sagemath now the canonical location for these images?

[fchapoton]

hello,
it seems you wrongly added the non-existing 9.10 instead of 10.0.
Concerning the location, I would suggest to stick to dockerhub
so my branch here ismaybe notso pertinent

[NathanDunfield]

Thanks for catching the nonexistent 9.10 issue, I feel like the CI should have raised an error there but it didn't. I have corrected to 10.0, so will close this ticket.

[NathanDunfield]

Ugh, I spoke too soon. I added 10.0, but GH actions "rounds" this to 10 and then sagemath/sagemath:10 does not exist.

[NathanDunfield]

Ugh, I spoke too soon. I added 10.0, but GH actions "rounds" this to 10 and then sagemath/sagemath:10 does not exist.

I solved this problem after a fashion by referring to 10.0 as latest.