Bump fastimage from 2.1.1 to 2.1.4 (#8847)

Bumps [fastimage](https://github.com/sdsykes/fastimage) from 2.1.1 to 2.1.4.
- [Release notes](https://github.com/sdsykes/fastimage/releases)
- [Commits](https://github.com/sdsykes/fastimage/compare/v2.1.1...v2.1.4)

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

Gemfile.lock

@@ -211,7 +211,7 @@ GEM
     faraday (0.15.0)
       multipart-post (>= 1.2, < 3)
     fast_blank (1.0.0)
-    fastimage (2.1.1)
+    fastimage (2.1.4)
     ffi (1.9.25)
     fog-core (1.45.0)
       builder