Update issue templates

Author: 0x2b3bfa0

.github/ISSUE_TEMPLATE/new-recording.md

@@ -0,0 +1,15 @@
+---
+name: New recording
+about: Contribute a recording to the collection
+title: 'New recording: {title}'
+labels: recording
+assignees: ''
+
+---
+
+* **Name of the original music:**
+* **Author of the orginal music:**
+* **Link to the original score:**
+* **Link to the recording:**
+
+<!-- Note: if you've customized the original score, you can attach it to the issue with drag-and-drop as a zip file. -->