Add VojtechStep as a maintainer (#895)

CONTRIBUTORS.toml

@@ -54,6 +54,18 @@ implementing the functional programming language Juvix. His PhD research is on
 graph theory from a univalent point of view.
 '''
 
+[[contributors]]
+displayName = "Vojtěch Štěpančík"
+maintainer = true
+usernames = [ "Vojtěch Štěpančík", "VojtechStep" ]
+homepage = "https://vojtechstep.eu/"
+github = "VojtechStep"
+bio = '''
+Vojtěch is a master\'s student at Charles University in Prague. His background
+is in software engineering, and he\'s working on formalizing synthetic
+homotopy theoretic topics for his thesis.
+'''
+
 [[contributors]]
 displayName = "Eléonore Mangel"
 usernames = [ "Eléonore Mangel", "EleonoreMangel", "Léo Mangel", "LeoMangel" ]
@@ -79,12 +91,6 @@ displayName = "Victor Blanchi"
 usernames = [ "VictorBlanchi" ]
 github = "VictorBlanchi"
 
-[[contributors]]
-displayName = "Vojtěch Štěpančík"
-usernames = [ "Vojtěch Štěpančík", "VojtechStep" ]
-homepage = "https://vojtechstep.eu/"
-github = "VojtechStep"
-
 [[contributors]]
 displayName = "Fernando Chu"
 usernames = [ "Fernando Chu", "fernando" ]