RFC 2977 is "Portable SIMD Project Group"

Author: KodrAus

text/0000-stdsimd.md renamed to text/2977-stdsimd.md

@@ -1,7 +1,7 @@
 - Feature Name: stdsimd_project_group
 - Start Date: 2020-08-28
-- RFC PR: [rust-lang/rfcs#0000](https://github.com/rust-lang/rfcs/pull/0000)
-- Rust Issue: [rust-lang/rust#0000](https://github.com/rust-lang/rust/issues/0000)
+- RFC PR: [rust-lang/rfcs#2977](https://github.com/rust-lang/rfcs/pull/2977)
+- Rust Issue: [rust-lang/rust-libs#4](https://github.com/rust-lang/libs-team/issues/4)
 
 # Summary
 [summary]: #summary