appdata metadata: replace backticks with quotes

data/go-for-it.appdata.xml.in.in

@@ -39,7 +39,7 @@ To-do lists are stored in the Todo.txt format. This simplifies synchronization w
           <li>The spacing between tasks has been increased to improve how the application looks on elementary OS 6.</li>
           <li>Depending on the Gtk theme, task checkboxes and descriptions may be aligned better.</li>
           <li>Made the parsing of timer and duration values more robust. For example: "timer:5m" will now also be parsed as a timer value, while previously only "timer:0h-5m-0s" would be accepted.</li>
-          <li>Now only `.txt` files are shown when selecting a file to store tasks in, by default.</li>
+          <li>Now only ".txt" files are shown when selecting a file to store tasks in, by default.</li>
           <li>The Portuguese translations have been updated.</li>
         </ul>
         <p>Fixed bugs:</p>
@@ -202,7 +202,7 @@ To-do lists are stored in the Todo.txt format. This simplifies synchronization w
           <li>A custom drag handle icon is now used instead of the "view-list" icon.</li>
           <li>Go For It! now highlights the task you are currently working on with ⏰.</li>
           <li>Changing the system clock or suspending your system will no longer affect the timer.</li>
-          <li>It is now possible to tell Go For It! how long a task should take by adding `duration:Xh-Ym` to the description of a task. (Where X and Y are the number of hours and minutes respectively. For a five minute task one would need to add `duration:5m`.) Go For It! will notify you when you exceed this duration. (Do not forget to enable timer logging so Go For It! will know how much time you have spent working on a task after closing the application!)</li>
+          <li>It is now possible to tell Go For It! how long a task should take by adding "duration:Xh-Ym" to the description of a task. (Where X and Y are the number of hours and minutes respectively. For a five minute task one would need to add "duration:5m".) Go For It! will notify you when you exceed this duration. (Do not forget to enable timer logging so Go For It! will know how much time you have spent working on a task after closing the application!)</li>
           <li>Not every break (or time between breaks) has to be of the same length: You can now use Go For It! as a pomodoro timer or use a custom timer schedule.</li>
           <li>Added an option to add new tasks at the start of each list instead of appending them to the end.</li>
           <li>Added "--list" and  "--load &lt;id&gt;" arguments to show the configured lists and load a specified list respectively.</li>