Translate BeginnerSegmentation.pot in pt_BR (#179)

100% translated source file: 'BeginnerSegmentation.pot'
on 'pt_BR'.

Co-authored-by: transifex-integration[bot] <43880903+transifex-integration[bot]@users.noreply.github.com>

Author: transifex-integration[bot]

internal_use/docs/locale/pt_BR/LC_MESSAGES/BeginnerSegmentation.po

@@ -39,7 +39,7 @@ msgstr ""
 
 #: ../../source/BeginnerSegmentation/BeginnerSegmentationPlugins.md:6
 msgid "Preparation"
-msgstr "Preparação"
+msgstr "Antes de começar"
 
 #: ../../source/BeginnerSegmentation/BeginnerSegmentationPlugins.md:8
 msgid "Download and install [CellProfiler](https://cellprofiler.org/)."