bolding function

subjects/matrix_transposition/README.md

@@ -4,7 +4,7 @@
 
 - Define the structure matrix as a tuple of 2 tuples of 2 `i32`'s.
 
-- Define a function that calculates the transpose matrix of a 2x2 matrix.
+- Define a **function** that calculates the transpose matrix of a 2x2 matrix.
 
 - Note:
 

subjects/tuples/README.md

@@ -6,7 +6,7 @@
 
 - Each student is identified by an id number of type i32, his/her name and his/her last name as a string Print the content of the tuple to stdout
 
-- Then define three functions to return the id, first name and last name.
+- Then define three **functions** to return the id, first name and last name.
 
 ### Notions