PWGHF: taskFlow.cxx: Uniformization of the name of the correlation containers (AliceO2Group#6715)

* Uniformization of the name of the correlation containers

* ONGOING WORK : Uniformize the name of Correlations containers

* Please consider the following formatting changes

* Solved typos in the declaration of 2 correlation containers

* Corrected a typo

* Typo correction

* Typo correction : everything case can run successfully now

---------

Co-authored-by: ALICE Action Bot <[email protected]>

Author: AlexianL