fix: Remove link from content no longer pending

Co-authored-by: Vito Secona <[email protected]>

Author: epage

content/inside-rust/this-development-cycle-in-cargo-1.90.md

@@ -113,7 +113,7 @@ preventing callers from being able to edit them to get specific behavior out of
 - `lock-dependencies`
 - `write-lockfile`
 - `resolve-features`
-- `plan-build` ([cargo-plumbing#96](https://github.com/crate-ci/cargo-plumbing/pull/96))
+- `plan-build`
 
 ### GSoC: Build script delegation