suggest about bpchar data type in the document

[yanliang lei]

I hope that：


 in the  https://www.postgresql.org/docs/14/datatype-characterin.html ，It needs 
to be written clearly  “bpchar” data type，


and in the above url, Only mentioned “blank padded” ，If someone does not know  
this knowledge point（blank padded =bp），he/she  will make a detour in the study 
of  character datatype。


so，To make the document more friendly, I suggest that： in the  
https://www.postgresql.org/docs/14/datatype-characterin.htm  ，It needs to be 
written clearly  “bpchar” data type。


thanks a lot！