Normalise line endings to LF (#574)

* Add .gitattributes

* Normalize line endings in repository

Author: penelopeysm

.gitattributes

@@ -0,0 +1,9 @@
+################
+# Line endings #
+################
+*     text=auto
+
+###################
+# GitHub Linguist #
+###################
+*.qmd linguist-language=Markdown

404.qmd

@@ -1,7 +1,7 @@
----
-title: Page Not Found
----
-
-The page you requested cannot be found (perhaps it was moved or renamed).
-
-You may want to visit [Get-Started Guide]({{< meta get-started >}}) or [Tutorials]({{< meta tutorials-intro >}}).
+---
+title: Page Not Found
+---
+
+The page you requested cannot be found (perhaps it was moved or renamed).
+
+You may want to visit [Get-Started Guide]({{< meta get-started >}}) or [Tutorials]({{< meta tutorials-intro >}}).