Bump fastly from 11.0.0 to 12.0.0

Bumps [fastly](https://github.com/fastly/fastly-ruby) from 11.0.0 to 12.0.0.
- [Release notes](https://github.com/fastly/fastly-ruby/releases)
- [Changelog](https://github.com/fastly/fastly-ruby/blob/main/CHANGELOG.md)
- [Commits](fastly/fastly-ruby@release/v11.0.0...release/v12.0.0)

---
updated-dependencies:
- dependency-name: fastly
  dependency-version: 12.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -206,9 +206,9 @@ GEM
       faraday-net_http (>= 2.0, < 3.1)
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
-    fastly (11.0.0)
+    fastly (12.0.0)
       typhoeus (~> 1.0, >= 1.0.1)
-    ffi (1.17.1)
+    ffi (1.17.2)
     foreman (0.88.1)
     formatador (1.1.0)
     globalid (1.2.1)