Fix image size and add period to instructions

Author: ellickau

README.md

@@ -2,7 +2,7 @@
 <p>Update on 23 Oct 2025</p>
 
 <h2> Flow Digram </h2>
-<img width="992" height="702" alt="image" src="https://github.com/user-attachments/assets/9e814277-397a-45ee-9ac4-e0a83faf3726" />
+<img width="500" alt="image" src="https://github.com/user-attachments/assets/9e814277-397a-45ee-9ac4-e0a83faf3726" />
 
 <p>Version: 0</p>
 <p>Language: C#</p>
@@ -14,7 +14,7 @@
    <li>Only <em>"admin"</em> username can access users' and books' details.</li>
    <li>Create new Users when you start the app.</li>
    <li>No username will be captured in this app.</li>
-   <li>Type <em>dotnet run</em> to execute application</li>
+   <li>Type <em>dotnet run</em> to execute application.</li>
 </ol>
 
 <h2> ULM Diagram </h2>