fix typo in compile instructions

Author: FMatti

README.md

@@ -23,8 +23,8 @@ To build a pdf version of the report and the presentation simply run the followi
 ```sh
 git clone https://github.com/FMatti/Minimal-DOC.git
 cd Minimal-DOC
-pdflatex Minimal-REP.tex && bibtex Minimal-REP.tex && pdflatex Minimal-REP.tex && pdflatex Minimal-REP.tex
-pdflatex Minimal-PRE.tex && bibtex Minimal-PRE.tex && pdflatex Minimal-PRE.tex && pdflatex Minimal-PRE.tex
+pdflatex Minimal-REP.tex && bibtex Minimal-REP.aux && pdflatex Minimal-REP.tex && pdflatex Minimal-REP.tex
+pdflatex Minimal-PRE.tex && bibtex Minimal-PRE.aux && pdflatex Minimal-PRE.tex && pdflatex Minimal-PRE.tex
 ```
 
 ## Filestructure