Bump sphinxcontrib-spelling from 5.3.0 to 5.4.0

Bumps [sphinxcontrib-spelling](https://github.com/sphinx-contrib/spelling) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/sphinx-contrib/spelling/releases)
- [Commits](sphinx-contrib/spelling@5.3.0...5.4.0)

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

Author: dependabot-preview[bot]

dev-requirements.txt

@@ -26,7 +26,7 @@ pyroma==2.6  # Packaging best practices checker
 pytest-cov==2.10.1  # Measure code coverage
 pytest==6.0.1  # Test runners
 sphinx-autodoc-typehints==1.11.0
-sphinxcontrib-spelling==5.3.0
+sphinxcontrib-spelling==5.4.0
 twine==3.2.0
 versioneer==0.18
 vulture==2.1