chore: consolidate tags

content/blog/2014-09-setting-openstreetmap-as-default-in-thunderbird-contacts.md

@@ -6,9 +6,7 @@ categories:
   - blog
   - english
 tags:
-  - email
-  - guide
-  - tools
+  - Communication
 
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 If you use Thunderbird and its contact functionality, you might already have stumbled over the „show on map“ feature. If you add addresses to your contacts (no matter if directly in Thunderbird or via CalDAV) there appears a button which enabled you to open a map with the contact’s location.