[Security] Bump excon from 0.62.0 to 0.71.0 (#12638)

Bumps [excon](https://github.com/excon/excon) from 0.62.0 to 0.71.0. **This update includes a security fix.**
- [Release notes](https://github.com/excon/excon/releases)
- [Changelog](https://github.com/excon/excon/blob/master/changelog.txt)
- [Commits](https://github.com/excon/excon/compare/v0.62.0...v0.71.0)

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

Gemfile.lock

@@ -238,7 +238,7 @@ GEM
     erubi (1.9.0)
     et-orbi (1.1.6)
       tzinfo
-    excon (0.62.0)
+    excon (0.71.0)
     fabrication (2.21.0)
     faker (2.8.0)
       i18n (>= 1.6, < 1.8)