Bump nanoc from 4.12.19 to 4.12.20 (#148)

Bumps [nanoc](https://github.com/nanoc/nanoc) from 4.12.19 to 4.12.20.
- [Release notes](https://github.com/nanoc/nanoc/releases)
- [Changelog](https://github.com/nanoc/nanoc/blob/main/nanoc/NEWS.md)
- [Commits](nanoc/nanoc@nanoc-cli-v4.12.19...nanoc-cli-v4.12.20)

---
updated-dependencies:
- dependency-name: nanoc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -1,15 +1,16 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.5)
+    addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
     adsf (1.5.0)
       rack (>= 1.0.0, < 4.0.0)
       rackup (~> 2.1)
+    base64 (0.2.0)
     builder (3.2.4)
     coderay (1.1.3)
     colored (1.2)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.2.3)
     cri (2.15.11)
     ddmetrics (1.1.0)
     ddplugin (1.0.3)
@@ -55,25 +56,27 @@ GEM
     method_source (1.0.0)
     mini_portile2 (2.8.5)
     multi_json (1.15.0)
-    nanoc (4.12.19)
+    nanoc (4.12.20)
       addressable (~> 2.5)
       colored (~> 1.2)
       nanoc-checking (~> 1.0, >= 1.0.2)
-      nanoc-cli (= 4.12.19)
-      nanoc-core (= 4.12.19)
+      nanoc-cli (= 4.12.20)
+      nanoc-core (= 4.12.20)
       nanoc-deploying (~> 1.0)
       parallel (~> 1.12)
       tty-command (~> 0.8)
       tty-which (~> 0.4)
-    nanoc-checking (1.0.2)
-      nanoc-cli (~> 4.12, >= 4.12.4)
-      nanoc-core (~> 4.12, >= 4.12.4)
-    nanoc-cli (4.12.19)
+    nanoc-checking (1.0.3)
+      nanoc-cli (~> 4.12, >= 4.12.5)
+      nanoc-core (~> 4.12, >= 4.12.5)
+    nanoc-cli (4.12.20)
       cri (~> 2.15)
       diff-lcs (~> 1.3)
-      nanoc-core (= 4.12.19)
+      nanoc-core (= 4.12.20)
+      pry
       zeitwerk (~> 2.1)
-    nanoc-core (4.12.19)
+    nanoc-core (4.12.20)
+      base64 (~> 0.2)
       concurrent-ruby (~> 1.1)
       ddmetrics (~> 1.0)
       ddplugin (~> 1.0)
@@ -97,13 +100,13 @@ GEM
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    parallel (1.23.0)
+    parallel (1.24.0)
     pastel (0.8.0)
       tty-color (~> 0.5)
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    psych (5.1.1.1)
+    psych (5.1.2)
       stringio
     public_suffix (5.0.4)
     pygments.rb (2.4.1)
@@ -133,7 +136,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.0)
-    set (1.0.3)
+    set (1.1.0)
     shellany (0.0.1)
     slow_enumerator_tools (1.1.0)
     sorted_set (1.0.3)
@@ -147,7 +150,7 @@ GEM
     tty-platform (0.3.0)
     tty-which (0.5.0)
     webrick (1.8.1)
-    zeitwerk (2.6.12)
+    zeitwerk (2.6.13)
 
 PLATFORMS
   ruby