CONTRIBUTING: Switcheroo the symlink for ergonomics

Github's web UI doesn't follow the symlink, which is unfortunate.
Make CONTRIBUTING.md the file with the content, and switch
docs/checklists/changes.md to point to CONTRIBUTING.md.

Change-Id: I4ac35a5cd7d8cfb7f4224a2cdddba531473f0a35
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
deleted file mode 120000
index b4d357f..0000000
--- a/CONTRIBUTING.md
+++ /dev/null
@@ -1 +0,0 @@
-docs/checklists/changes.md
\ No newline at end of file
diff --git a/docs/checklists/changes.md b/CONTRIBUTING.md
similarity index 100%
rename from docs/checklists/changes.md
rename to CONTRIBUTING.md
diff --git a/docs/checklists/changes.md b/docs/checklists/changes.md
new file mode 120000
index 0000000..f939e75
--- /dev/null
+++ b/docs/checklists/changes.md
@@ -0,0 +1 @@
+../../CONTRIBUTING.md
\ No newline at end of file