Bump ffi from 1.9.18 to 1.11.1 in /DataProcessing/guide

Bumps [ffi](https://github.com/ffi/ffi) from 1.9.18 to 1.11.1.
- [Release notes](https://github.com/ffi/ffi/releases)
- [Changelog](https://github.com/ffi/ffi/blob/master/CHANGELOG.md)
- [Commits](ffi/ffi@1.9.18...1.11.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

DataProcessing/guide/Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    ffi (1.9.18)
+    ffi (1.11.1)
     gemoji (3.0.0)
     gemoji-parser (1.3.1)
       gemoji (>= 2.1.0)