data: update sample_content.yaml to fix tests

rendercv/data/sample_content.yaml

@@ -3,7 +3,7 @@ name: John Doe
 location: Your Location
 email: youremail@yourdomain.com
 phone: tel:+90-541-999-99-99
-website: '[yourwebsite.com](https://example.com/)'
+website: https://yourwebsite.com/
 social_networks:
   - network: LinkedIn
     username: yourusername
@@ -25,7 +25,7 @@ sections:
     - bullet: '[Here](https://docs.rendercv.com/user_guide/), you can find a comprehensive
         user guide for RenderCV.'
   education:
-    - school: University of Pennsylvania
+    - institution: University of Pennsylvania
       area: Computer Science
       degree: BS
       start_date: 2000-09
@@ -74,18 +74,18 @@ sections:
       highlights:
         - Developed an electronic classroom where multiple users can simultaneously
           view and draw on a "chalkboard" with each person's edits synchronized
-        - Tools Used: C++, MFC
+        - "Tools Used: C++, MFC"
     - name: Synchronized Desktop Calendar
       date: '[github.com/name/repo](https://github.com/sinaatalay/rendercv)'
       highlights:
         - Developed a desktop calendar with globally shared and synchronized calendars,
           allowing users to schedule meetings with other users
-        - Tools Used: C#, .NET, SQL, XML
+        - "Tools Used: C#, .NET, SQL, XML"
     - name: Custom Operating System
       date: 2002
       highlights:
         - Built a UNIX-style OS with a scheduler, file system, text editor, and calculator
-        - Tools Used: C
+        - "Tools Used: C"
   technologies:
     - label: Languages
       details: C++, C, Java, Objective-C, C#, SQL, JavaScript