Rename "Introductory Tutorials" category to "Tutorials"

The subject matter limitation implied by the previous category name was unnecessarily limiting, leaving no clear
location for publishing and discovering tutorials on intermediate or advanced subjects.

The increased scope provided by the category name change allows the curation of tutorials for all users without
increasing the complexity of the forum's category structure.

Author: per1234

content/categories/order.md

@@ -5,7 +5,7 @@
 - Using Arduino
   - Uncategorized
   - IDE 1.x
-  - Introductory Tutorials
+  - Tutorials
   - Avrdude, stk500, Bootloader issues
   - Project Guidance
   - Programming

content/categories/using-arduino/introductory-tutorials/_topics/about-the-introductory-tutorials-category/1.md

@@ -1,4 +1,4 @@
-# Introductory Tutorials
+# Tutorials
 
 ## Permissions
 
@@ -10,4 +10,4 @@
 
 ## Published At
 
-https://forum.arduino.cc/c/using-arduino/introductory-tutorials/80
+https://forum.arduino.cc/c/using-arduino/tutorials/80

content/categories/using-arduino/introductory-tutorials/_topics/about-the-introductory-tutorials-category/README.md

@@ -1,5 +1,5 @@
 - https://forum.arduino.cc/t/flashing-multiple-leds-at-the-same-time/1065564
-- https://forum.arduino.cc/t/about-the-introductory-tutorials-category/847520
+- https://forum.arduino.cc/t/about-the-tutorials-category/847520
 - https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum/681307
 - https://forum.arduino.cc/t/getting-started-with-arduino-create-project-hub-web-editor-device-manager/537039
 - https://forum.arduino.cc/t/serial-input-basics-updated/382007

content/categories/using-arduino/introductory-tutorials/README.md renamed to content/categories/using-arduino/tutorials/README.md

@@ -0,0 +1 @@
+A curated collection of tutorials

content/categories/using-arduino/introductory-tutorials/_pins.md renamed to content/categories/using-arduino/tutorials/_pins.md

@@ -0,0 +1,5 @@
+# About the Tutorials category
+
+## Published At
+
+https://forum.arduino.cc/t/about-the-tutorials-category/847520