Punctuation error in line 157

Changed "relational" to "Relational"

Author: Rabbul-Khan

src/content/0/en/part0a.md

@@ -154,7 +154,7 @@ By submitting all exercises for part 12 of the course on Container technology, y
 - [Enroll in part 12 through the Open University](https://www.avoin.helsinki.fi/palvelut/esittely.aspx?s=otm-51a6f590-607c-4e34-bd6f-2d87e2203d9a). 
 - [Request credits for part 12](https://fullstackopen.com/en/part0/general_info/#how-to-get-your-credits).
 
-#### Part 13 - Full Stack Web Development: relational databases (1 cr, CSM14114)
+#### Part 13 - Full Stack Web Development: Relational databases (1 cr, CSM14114)
 
 By submitting all exercises for part 13 of the course on Relational databases, you can earn one additional credit. More information about this part's prerequisites and exercise submission can be found in [part 13](/en/part13).
 - Submit all exercises for part 13.