Renumber docs from v2.12 to v3.0

Author: jeremystretch

docs/release-notes/index.md

@@ -1 +1 @@
-version-2.12.md
+version-3.0.md

docs/release-notes/version-2.12.md renamed to docs/release-notes/version-3.0.md

@@ -1,6 +1,6 @@
-# NetBox v2.12
+# NetBox v3.0
 
-## v2.12-beta1 (FUTURE)
+## v3.0-beta1 (FUTURE)
 
 ### Enhancements
 

mkdocs.yml

@@ -94,6 +94,7 @@ nav:
         - User Preferences: 'development/user-preferences.md'
         - Release Checklist: 'development/release-checklist.md'
     - Release Notes:
+        - Version 3.0: 'release-notes/version-3.0.md'
         - Version 2.11: 'release-notes/version-2.11.md'
         - Version 2.10: 'release-notes/version-2.10.md'
         - Version 2.9: 'release-notes/version-2.9.md'