Bump excon from 0.67.0 to 0.71.0 in /Example

Bumps [excon](https://github.com/excon/excon) from 0.67.0 to 0.71.0.
- [Release notes](https://github.com/excon/excon/releases)
- [Changelog](https://github.com/excon/excon/blob/master/changelog.txt)
- [Commits](excon/excon@v0.67.0...v0.71.0)

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

Example/Gemfile.lock

@@ -64,7 +64,7 @@ GEM
     dotenv (2.7.5)
     emoji_regex (1.0.1)
     escape (0.0.4)
-    excon (0.67.0)
+    excon (0.71.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)