Fixed bibtex

Author: mimeiners

_bibliography/references.bib

@@ -213,7 +213,7 @@ @TechReport{mietke2024
   year         = {2024},
   type         = {techreport},
   howpublished = {online},
-  school       = {Oberstufenzentrum f{\"u}r Kommunikations-, Informations- und Medientechnik (OSZ-KIM), Berlin},
+  institution  = {Oberstufenzentrum f{\"u}r Kommunikations-, Informations- und Medientechnik (OSZ-KIM), Berlin},
   url          = {https://www.elektroniktutor.de},
 }
 
@@ -277,7 +277,7 @@ @TechReport{schenke2023
   title        = {{G}rundlagen der {E}lektrotechnik --- {J}etzt schaffst {D}u die {P}rüfung!},
   year         = {2023},
   howpublished = {online},
-  school       = {Helmut-Schmidt Universit{\"{a}}t Hamburg, Germany},
+  institution  = {Helmut-Schmidt Universit{\"{a}}t Hamburg, Germany},
   url          = {http://www.stefan-schenke.de/get/},
 }