Merge #356

356: Try to fix Scrapy ERROR: Spider error processing r=alallema a=alallema

Currently when running doc-scraper this error occur:
```sh
2023-03-14 12:10:56 [scrapy.core.scraper] ERROR: Spider error processing <GET https://docs.meilisearch.com/learn/advanced/geosearch.html> (referer: https://docs.meilisearch.com/sitemap.xml)
Traceback (most recent call last):
  File "/Users/amelielallemand/.local/share/virtualenvs/docs-scraper-vWaWSN46/lib/python3.9/site-packages/twisted/internet/defer.py", line 892, in _runCallbacks
    current.result = callback(  # type: ignore[misc]
  File "/Users/amelielallemand/Projects/meili/repo/docs-scraper/scraper/src/documentation_spider.py", line 170, in parse_from_sitemap
    self.add_records(response, from_sitemap=True)
  File "/Users/amelielallemand/Projects/meili/repo/docs-scraper/scraper/src/documentation_spider.py", line 151, in add_records
    records = self.strategy.get_records_from_response(response)
  File "/Users/amelielallemand/Projects/meili/repo/docs-scraper/scraper/src/strategies/default_strategy.py", line 44, in get_records_from_response
    records = self.get_records_from_dom(response.url)
  File "/Users/amelielallemand/Projects/meili/repo/docs-scraper/scraper/src/strategies/default_strategy.py", line 67, in get_records_from_dom
    sys.exit('DefaultStrategy.dom is not defined')
SystemExit: DefaultStrategy.dom is not defined
```
This PR try to fix it

Co-authored-by: alallema <amelie@meilisearch.com>

scraper/src/strategies/abstract_strategy.py

@@ -39,9 +39,8 @@ def get_dom(response):
         try:
             body = response.body.decode(response.encoding)
             result = lxml.html.fromstring(body)
-        except (UnicodeError, ValueError):
+        except (UnicodeError, ValueError, lxml.etree.ParserError):
             result = lxml.html.fromstring(response.body)
-
         return result
 
     def get_strip_chars(self, level, selectors):