Update README.md

Fixe markdown

README.md

@@ -1,26 +1,27 @@
 # Bibliography
-    Hello, here is an attempt to establish a shared bibliography in BibTex format (to facilitate exports to Zotero :)) Thank you for contributing by respecting the formalism below.
-    
-    Bonjour, voici une tentative d'établir une bibliographie partagée en format BibTex (pour faciliter les exports vers Zotero :))
 
-    Merci de contribuer en respectant le formalisme ci-dessous.
+Hello, here is an attempt to establish a shared bibliography in BibTex format (to facilitate exports to Zotero :)) Thank you for contributing by respecting the formalism below.
 
+Bonjour, voici une tentative d'établir une bibliographie partagée en format BibTex (pour faciliter les exports vers Zotero :))
 
-    @book{étiquette,
+Merci de contribuer en respectant le formalisme ci-dessous.
 
-    author = {},
+```bibtex
+@book{étiquette,
 
-    title = {},
+author = {},
 
-    year = {},
+title = {},
 
-    publisher = {},
+year = {},
 
-    address = {},
+publisher = {},
 
-    note = {},
+address = {},
 
-    isbn = {}}
+note = {},
 
+isbn = {}}
+```
 
-    Want to know more about BibTeX ? => https://www.bibtex.com/g/bibtex-format/
+Want to know more about BibTeX ? => <https://www.bibtex.com/g/bibtex-format/>