I have a data frame with date and time column
data published_at
0 0.0 2015-11-05T12:55:34.685Z
1 0.0 2015-11-05T12:55:44.695Z
2 0.0 2015-11-05T12:56:25.328Z
3 0.0 2015-11-05T12:56:35.333Z
4 0.0 2015-11-05T12:56:45.332Z
I wanted to convert into the following format
data published_at
0 0.0 2015-11-05 12:55:34.685
1 0.0 2015-11-05 12:55:44.695
2 0.0 2015-11-05 12:56:25.328
3 0.0 2015-11-05 12:56:35.333
4 0.0 2015-11-05 12:56:45.332