Bump lxml in /3. Web Scraping using Scrapy, Mongo ETL

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>

Author: dependabot[bot]

3. Web Scraping using Scrapy, Mongo ETL/requirements.txt

@@ -7,7 +7,7 @@ cssselect==1.1.0
 hyperlink==19.0.0
 idna==2.9
 incremental==17.5.0
-lxml==4.6.3
+lxml==4.6.5
 parsel==1.5.2
 Protego==0.1.16
 pyasn1==0.4.8