[Modify] Replace Buy Me a Coffee links with Ko-fi support links

practice-exam/exams.md

@@ -39,6 +39,6 @@ If this guide has been helpful to you please share it with others and react to t
 ![Ebook_Cover](../images/Ebook_Cover.png)
 
 **[Sample PDF](../images/AWS-Cloud-Practitioner-Practice-Exams-Sample.pdf)**      
-**[Buy Practice Exams PDF](https://www.buymeacoffee.com/kananinirav/e/174069)**      
+**[Buy Practice Exams PDF](https://ko-fi.com/s/26525f2067)**      
 
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practice-exam/practice-exam-3.md

@@ -472,7 +472,7 @@ layout: exam
     - B. Reserved instances require at least a one-year pricing commitment.
     - C. There is no additional charge for using dedicated instances.
     - D. Reserved instances provide a significant discount compared to on-demand instances.
-    - E.Reserved instances are best suited for periodic workloads.
+    - E. Reserved instances are best suited for periodic workloads.
 
     <details markdown=1><summary markdown='span'>Answer</summary>
       Correct answer: B, D