Remove tilda on isa riscv build dist
# CentOS Infra issue/request
## Issue Type
* [] Issue - problem with something that was working
* [x] Feature Request - something you'd like us to add/modify/change
* [] Task - mostly used by CentOS Infra team for day-to-day operations or bigger plans
## Description
The ISA SIG riscv second mass rebuild is complete. Please remove the \~2 from the %dist variable.
This should change dist from .el10s\~2 to .el10s
issue