bumps version from release candidate to stable

Author: tmacharia

Paginator.EntityFrameworkCore.csproj

@@ -13,7 +13,7 @@
 	  <RepositoryUrl>https://github.com/tmacharia/paginator.efcore</RepositoryUrl>
 	  <PackageTags>linq, pagination, paginator, paging, efcore</PackageTags>
 	  <PackageId>Paginator.EntityFrameworkCore</PackageId>
-	  <Version>3.1.15-rc</Version>
+	  <Version>3.1.15</Version>
 	  <NeutralLanguage>en</NeutralLanguage>
 	  <PackageLicenseUrl></PackageLicenseUrl>
 	  <RepositoryType>git</RepositoryType>