Add appropriate letters to placement after the number

[mrengy]

On a year story like https://historyscv-stage.dreamhosters.com/year_story/2001-scv/ there's the placement shown after the score. Currently it just shows "(4)" in this case. Make it say "1st", "2nd", "3rd", "4th", etc. as appropriate based on the number value entered.

Note, this will likely require editing this line of code in template-parts / content.php and experimenting with changing the "final placement" custom field when editing the year story in WordPress Admin