Fix doc tag inconsistencies and add missing ai changelog type

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/changelog.d/fix-doc-tags-and-changelog-types.doc.md

@@ -0,0 +1 @@
+Add missing `ai` changelog fragment type to update-documentation guide, consolidate `cicd`→`ci-cd` and `network`→`networking` tags

docs/how-to/update-documentation.md

@@ -38,7 +38,7 @@ When making changes, add a changelog fragment to `docs/changelog.d/`:
 
 ```bash
 # Format: <identifier>.<type>.md
-# Types: feature, bugfix, infra, doc, misc
+# Types: feature, bugfix, infra, doc, ai, misc
 
 # Using branch name (preferred)
 echo "Add new feature X" > docs/changelog.d/my-feature.feature.md
@@ -56,6 +56,7 @@ Fragments are automatically collected into `CHANGELOG.md` (at repo root) during
 | `bugfix` | `bugfix/` | Bug fixes |
 | `infra` | `infra/` | Infrastructure changes |
 | `doc` | `doc/` | Documentation updates |
+| `ai` | `ai/` | AI assistance changes |
 | `misc` | `misc/` | Other changes |
 
 ## Runner Environment

docs/reference/infrastructure/routing.md

@@ -2,7 +2,7 @@
 title: service-routing
 tags:
   - infrastructure
-  - network
+  - networking
 ---
 
 # Service Routing

docs/reference/infrastructure/tailscale.md

@@ -2,7 +2,7 @@
 title: tailscale
 tags:
   - infrastructure
-  - network
+  - networking
 ---
 
 # Tailscale

docs/reference/services/forgejo.md

@@ -3,7 +3,7 @@ title: forgejo
 tags:
   - service
   - git
-  - cicd
+  - ci-cd
 ---
 
 # Forgejo