Update ndarray requirement from =0.16.1 to =0.17.2

Updates the requirements on [ndarray](https://github.com/rust-ndarray/ndarray) to permit the latest version.
- [Release notes](https://github.com/rust-ndarray/ndarray/releases)
- [Changelog](https://github.com/rust-ndarray/ndarray/blob/master/RELEASES.md)
- [Commits](rust-ndarray/ndarray@0.16.1...0.17.2)

---
updated-dependencies:
- dependency-name: ndarray
  dependency-version: 0.17.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -100,7 +100,7 @@ roots = "0.0.8"
 
 # Least squares solver (NOTE: ndarray must be version 0.15 - not 0.16)
 # Bug report: https://github.com/argmin-rs/modcholesky/issues/34
-ndarray = { version = "=0.16.1", features = ["approx"] }
+ndarray = { version = "=0.17.2", features = ["approx"] }
 modcholesky = "0.2"
 
 # jemallocator is an optional feature; it will only be loaded if the feature