build(deps): bump matplotlib from 3.4.1 to 3.4.2 (#149)

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.4.1 to 3.4.2.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](https://github.com/matplotlib/matplotlib/compare/v3.4.1...v3.4.2)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

scripts/KlipperScreen-requirements.txt

@@ -1,6 +1,6 @@
 humanize==3.5.0
 jinja2==2.11.3
-matplotlib==3.4.1
+matplotlib==3.4.2
 netifaces==0.10.9
 requests==2.25.1
 vext==0.7.6