How to remove line break before a specific character notepad ++?

Zdrastvujte ,there is a problem with the database ,it now looks like this:
question 1
:answer 1
question 2
:ответ2
question 3
:answer3

How would I use regular or instruments neatly in front of the characters : to remove the line break to Baza had the following form:
question 1:ответ1
question 2:ответ2
question 3:answer3

Googled,nothing specifically on the problem is not found
March 11th 20 at 19:26
1 answer
March 11th 20 at 19:28
Solution
The search pattern \r?\n:
Replacement string :
https://regex101.com/r/zV0DEE/1

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