Bump rdf-normalize from 0.5.1 to 0.6.1

Bumps [rdf-normalize](https://github.com/ruby-rdf/rdf-normalize) from 0.5.1 to 0.6.1.
- [Release notes](https://github.com/ruby-rdf/rdf-normalize/releases)
- [Commits](https://github.com/ruby-rdf/rdf-normalize/compare/0.5.1...0.6.1)

---
updated-dependencies:
- dependency-name: rdf-normalize
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -98,7 +98,7 @@ gem 'webauthn', '~> 2.5'
 
 gem 'json-ld'
 gem 'json-ld-preloaded', '~> 3.2'
-gem 'rdf-normalize', '~> 0.5'
+gem 'rdf-normalize', '~> 0.6'
 
 group :development, :test do
   gem 'fabrication', '~> 2.30'

Gemfile.lock

@@ -550,9 +550,9 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     random_name_generator (2.0.1)
-    rdf (3.2.9)
+    rdf (3.2.11)
       link_header (~> 0.0, >= 0.0.8)
-    rdf-normalize (0.5.1)
+    rdf-normalize (0.6.1)
       rdf (~> 3.2)
     redcarpet (3.6.0)
     redis (4.5.1)
@@ -851,7 +851,7 @@ DEPENDENCIES
   rails-i18n (~> 6.0)
   rails-settings-cached (~> 0.6)
   random_name_generator
-  rdf-normalize (~> 0.5)
+  rdf-normalize (~> 0.6)
   redcarpet (~> 3.6)
   redis (~> 4.5)
   redis-namespace (~> 1.10)