Bump blurhash from 0.1.4 to 0.1.5 (#15942)

Bumps [blurhash](https://github.com/Gargron/blurhash) from 0.1.4 to 0.1.5.
- [Release notes](https://github.com/Gargron/blurhash/releases)
- [Commits](https://github.com/Gargron/blurhash/commits/v0.1.5)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -102,8 +102,8 @@ GEM
     bindata (2.4.8)
     binding_of_caller (1.0.0)
       debug_inspector (>= 0.0.1)
-    blurhash (0.1.4)
-      ffi (~> 1.10.0)
+    blurhash (0.1.5)
+      ffi (~> 1.14)
     bootsnap (1.6.0)
       msgpack (~> 1.0)
     brakeman (4.10.1)
@@ -222,7 +222,7 @@ GEM
     faraday-net_http (1.0.1)
     fast_blank (1.0.0)
     fastimage (2.2.3)
-    ffi (1.10.0)
+    ffi (1.14.2)
     ffi-compiler (1.0.1)
       ffi (>= 1.0.0)
       rake