What would you do in my situation?

I got the first Astrazeneca vaccine in June 3

All info says it's a lot more effective if you wait 3 months between the first and second shot

"a recent study in The Lancet found AZ's efficacy dropped to 60% when administered at eight weeks, compared with more than 80% at 12 weeks"

Now government wants people to get it at 8 weeks, because getting it at 8 weeks is better than catching delta variant with only 1 shot.

My cellphone just received the option to get the second shot tomorrow.
I'm thinking of delaying it a month, but I'm not sure