Release names of 0.2.x are inconsistence with 0.1.x

Hi, have you accidentally added a blank in release CI? See file names in `pget_checksums.txt` and release page, there's a blank after `pget_` for every archives (`.tar.gz` and `.zip`), e.g. `pget_ 0.2.1_Windows_x86_64.zip`, and in release page of GitHub, they become dot `.`.