Rename "Exhibition / Gallery" category to "Showcase"

The previous category name was unnecessarily verbose. Reducing the verbosity is beneficial because it makes it more
likely that the full name can be seen in category listings, rather than being truncated.

Author: per1234

content/categories/community/exhibition-gallery/_topics/about-the-exhibition-gallery-category/README.md

@@ -1,4 +1,4 @@
-# Exhibition / Gallery
+# Showcase
 
 ## Permissions
 
@@ -8,4 +8,4 @@
 
 ## Published At
 
-https://forum.arduino.cc/c/community/exhibition-gallery/45
+https://forum.arduino.cc/c/community/showcase/45

content/categories/community/exhibition-gallery/README.md renamed to content/categories/community/showcase/README.md

@@ -1,2 +1,2 @@
-- https://forum.arduino.cc/t/about-the-exhibition-gallery-category/847485
+- https://forum.arduino.cc/t/about-the-showcase-category/847485
 - https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/681339

content/categories/community/exhibition-gallery/_pins.md renamed to content/categories/community/showcase/_pins.md

@@ -0,0 +1,5 @@
+# About the Showcase category
+
+## Published At
+
+https://forum.arduino.cc/t/about-the-showcase-category/847485

content/categories/community/exhibition-gallery/_topics/about-the-exhibition-gallery-category/1.md renamed to content/categories/community/showcase/_topics/about-the-showcase-category/1.md

@@ -114,7 +114,7 @@
     - Makers
     - Events and Tour
   - Local Groups
-  - Exhibition / Gallery
+  - Showcase
   - Bar Sport
   - Project Hub
 - Development