Fix RS2007 not allowing table borders

[Thomas-Shephard]

Allows release trackers to have table borders without raising a warning for RS2007.

Fixes #7465

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.50%. Comparing base (d6e7d82) to head (3538b50).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7466   +/-   ##
=======================================
  Coverage   96.50%   96.50%           
=======================================
  Files        1448     1448           
  Lines      346895   346895           
  Branches    11404    11404           
=======================================
+ Hits       334755   334761    +6     
+ Misses       9250     9245    -5     
+ Partials     2890     2889    -1     

[mavasani]

Can you add a unit test for the change?

[Thomas-Shephard]

@dotnet-policy-service agree

[Thomas-Shephard]

I've fixed a slight omission in my original pull request where I didn't remove the leading and trailing pipe symbols before the entry parts are parsed.

I've also added some tests for this but happy to add more if you would like, let me know :)