Bump rsa from 4.0 to 4.7 in /crawlerx_server

Bumps [rsa](https://github.com/sybrenstuvel/python-rsa) from 4.0 to 4.7.
- [Release notes](https://github.com/sybrenstuvel/python-rsa/releases)
- [Changelog](https://github.com/sybrenstuvel/python-rsa/blob/main/CHANGELOG.md)
- [Commits](sybrenstuvel/python-rsa@version-4.0...version-4.7)

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

crawlerx_server/requirements.txt

@@ -55,7 +55,7 @@ python-scrapyd-api==2.1.2
 pytz==2020.1
 queuelib==1.5.0
 requests==2.23.0
-rsa==4.0
+rsa==4.7
 Scrapy==2.1.0
 scrapyd==1.2.1
 service-identity==18.1.0