Changed extension to yaml so the yaml-checker works.

.github/ISSUE_TEMPLATE/bug_report.yml → .github/ISSUE_TEMPLATE/bug_report.yaml

@@ -37,4 +37,4 @@ body:
       label: Additional context
       description: Add screenshots etc. (Anything that will provide more context about the problem)
     validations:
-      required: false
+      required: false

.github/ISSUE_TEMPLATE/config.yml → .github/ISSUE_TEMPLATE/config.yaml

@@ -11,4 +11,4 @@ contact_links:
 
   - name: Question
     url: "https://discord.gg/NS3m3ad"
-    about: "Please ask questions in our Discord in the channel format-related"
+    about: "Please ask questions in our Discord in the channel format-related"

.github/ISSUE_TEMPLATE/feature_request.yml → .github/ISSUE_TEMPLATE/feature_request.yaml

@@ -32,4 +32,4 @@ body:
       label: Extra info/examples/attachments
       description: Add screenshots etc. (Anything that will give us more context about what is being requested!)
     validations:
-      required: false
+      required: false

.github/workflows/build_and_release.yml → .github/workflows/build_and_release.yaml

@@ -3,7 +3,7 @@ name: Build and Release UltraStar Format Specification Website
 # Controls when the workflow will run
 on:
   # Triggers the workflow on merges to master, release branches,
-  # all PRs, and release tags 
+  # all PRs, and release tags
   push:
     branches:
       - main
@@ -43,4 +43,3 @@ jobs:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v2
-