Bump excon from 0.45.1 to 0.71.0 in /docs/manual

Bumps [excon](https://github.com/excon/excon) from 0.45.1 to 0.71.0.
- [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/v0.45.1...v0.71.0)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/docs/manual/Gemfile.lock b/docs/manual/Gemfile.lock
index b4db9be..a5ee145 100644
--- a/docs/manual/Gemfile.lock
+++ b/docs/manual/Gemfile.lock
@@ -43,7 +43,7 @@
     ethon (0.8.1)
       ffi (>= 1.3.0)
     eventmachine (1.0.7)
-    excon (0.45.1)
+    excon (0.71.0)
     execjs (2.6.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)