Merge pull request #18492 from samestep/docs-dev-no-design-label

Replace Design label with C-Architecture

Author: lnicola

src/tools/rust-analyzer/docs/dev/README.md

@@ -47,7 +47,7 @@ https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer
   Each triaged issue should have one of these labels.
 * [fun](https://github.com/rust-lang/rust-analyzer/issues?q=is%3Aopen+is%3Aissue+label%3Afun)
   is for cool, but probably hard stuff.
-* [Design](https://github.com/rust-lang/rust-analyzer/issues?q=is%3Aopen+is%3Aissue+label%Design)
+* [C-Architecture](https://github.com/rust-lang/rust-analyzer/issues?q=is%3Aissue%20state%3Aopen%20label%3AC-Architecture)
   is for moderate/large scale architecture discussion.
   Also a kind of fun.
   These issues should generally include a link to a Zulip discussion thread.