Bump lxml from 4.6.3 to 4.6.5

Bumps [lxml](https://github.com/lxml/lxml) from 4.6.3 to 4.6.5.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.6.3...lxml-4.6.5)

---
updated-dependencies:
- dependency-name: lxml
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -3,7 +3,7 @@ django-crispy-forms==1.8.1
 django-extensions==2.2.8
 et-xmlfile==1.0.1
 jdcal==1.4.1
-lxml==4.6.3
+lxml==4.6.5
 numpy==1.18.1
 openpyxl==3.0.3
 pandas==1.0.1