Whats those leaf symptoms?

I would just feed the CalMag to her in your next watering, mate. She should be fine - just watch for any progression. Personally I also think your RH is quite low for what is basically still the veg period (she's still growing). 45% is spot on for later in flower,but it's best to drop it gradually from the 70-80% you had during veg. Good luck anyway, they look great otherwise!

I have advanced nutrients calmag xtra. Do you guys recommend it to use as foliar spray ?

Magnesium deficiency.

So, looking at the diary, I noticed that 1ml of Connoisseur seems a bit low to me personally. I know everyone recommends giving less, but that's a bit too little. It should go up to 3ml if you really want to give the minimum, 2.5ml, but the plant needs to eat. As for the rest, it seems like you're starting to see a calcium and magnesium deficiency on some leaves; the light green is between the veins, and it often starts like this... I'm saying this because I saw the diary, and you've always used 1ml of fertilizer except for the last week when you gave 1.5ml.