fixed apostrophes in english localization

src/main/resources/languages/_en.properties

@@ -10,8 +10,8 @@ github.url=https://github.com/deadlocker8/BudgetMaster
 errorpages.home=To Homepage
 errorpages.400=Bad request.
 errorpages.403=Access denied.
-errorpages.404=The requested page doesn't exist.
-errorpages.418=I'm a teapot.
+errorpages.404=The requested page doesn''t exist.
+errorpages.418=I''m a teapot.
 errorpages.418.credits=Teapot icon made by <a href="http://www.freepik.com" title="Freepik">Freepik</a> from <a href="https://www.flaticon.com/" title="Flaticon">www.flaticon.com</a> is licensed by <a href="http://creativecommons.org/licenses/by/3.0/" title="Creative Commons BY 3.0" target="_blank">CC 3.0 BY</a>
 errorpages.500=An internal server error occurred.
 
@@ -60,7 +60,7 @@ delete=Delete
 today=Today
 tagfield.placeholder=Enter Tag here
 placeholder=No data available
-placeholder.seems.empty=It's pretty empty here...
+placeholder.seems.empty=It''s pretty empty here...
 placeholder.advice=Get started by adding {0}
 
 # WEEK DAYS