Bump nanoc from 4.12.16 to 4.12.18

Bumps [nanoc](https://github.com/nanoc/nanoc) from 4.12.16 to 4.12.18.
- [Release notes](https://github.com/nanoc/nanoc/releases)
- [Commits](nanoc/nanoc@nanoc-cli-v4.12.16...nanoc-cli-v4.12.18)

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

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

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.4)
+    addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
     adsf (1.4.7)
       rack (>= 1.0.0, < 4.0.0)
@@ -59,25 +59,25 @@ GEM
       builder
       minitest (>= 5.0)
       ruby-progressbar
-    nanoc (4.12.16)
+    nanoc (4.12.18)
       addressable (~> 2.5)
       colored (~> 1.2)
       nanoc-checking (~> 1.0, >= 1.0.2)
-      nanoc-cli (= 4.12.16)
-      nanoc-core (= 4.12.16)
+      nanoc-cli (= 4.12.18)
+      nanoc-core (= 4.12.18)
       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 (4.12.16)
+    nanoc-cli (4.12.18)
       cri (~> 2.15)
       diff-lcs (~> 1.3)
-      nanoc-core (= 4.12.16)
+      nanoc-core (= 4.12.18)
       zeitwerk (~> 2.1)
-    nanoc-core (4.12.16)
+    nanoc-core (4.12.18)
       concurrent-ruby (~> 1.1)
       ddmetrics (~> 1.0)
       ddplugin (~> 1.0)
@@ -108,7 +108,7 @@ GEM
       method_source (~> 1.0)
     psych (4.0.6)
       stringio
-    public_suffix (5.0.1)
+    public_suffix (5.0.3)
     puma (6.4.0)
       nio4r (~> 2.0)
     racc (1.7.1)
@@ -136,7 +136,7 @@ GEM
     sorted_set (1.0.3)
       rbtree
       set (~> 1.0)
-    stringio (3.0.7)
+    stringio (3.0.8)
     systemu (2.6.5)
     thor (1.0.1)
     tty-color (0.6.0)
@@ -145,7 +145,7 @@ GEM
     tty-platform (0.3.0)
     tty-which (0.5.0)
     webrick (1.8.1)
-    zeitwerk (2.6.8)
+    zeitwerk (2.6.12)
 
 PLATFORMS
   ruby