Bump pyinstrument from 3.4.2 to 4.6.2

Bumps [pyinstrument](https://github.com/joerick/pyinstrument) from 3.4.2 to 4.6.2.
- [Release notes](https://github.com/joerick/pyinstrument/releases)
- [Commits](joerick/pyinstrument@v3.4.2...v4.6.2)

---
updated-dependencies:
- dependency-name: pyinstrument
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

requirements-dev.txt

@@ -162,10 +162,8 @@ pycodestyle==2.3.1
     # via flake8
 pyflakes==1.5.0
     # via flake8
-pyinstrument==3.4.2
+pyinstrument==4.6.2
     # via -r requirements-dev.in
-pyinstrument-cext==0.2.4
-    # via pyinstrument
 pympler==1.0.1
     # via -r requirements-dev.in
 pypandoc==1.8.1