Merge pull request codingforentrepreneurs#1 from patel-himanshu/patel-himanshu-fixed-typo-in-day-6

Update Day 6 - String Formatting & F-Strings.md

Author: patel-himanshu

tutorial-reference/Day 6/Day 6 - String Formatting & F-Strings.md

@@ -21,7 +21,7 @@ Basic formatting:
 
 `\"`: Allowed Double quote
 
-`{{` or `}}`: Allowed signle curly bracket in formatted strings
+`{{` or `}}`: Allowed single curly bracket in formatted strings
 
 `"your single-line text"`: Wrap a single quote (`'`) or double quote (`"`) around text / numbers to make it a string.
 
@@ -330,4 +330,4 @@ TypeError: format expected at least 1 argument, got 0
 '3.14523423'
 >>> f"{format(pi, '.2f')}"
 '3.15'
-```
+```