docs: cleanup header levels in backend docs (#5698)

docs/content/amazonclouddrive.md

@@ -22,7 +22,7 @@ keys see [the forum](https://forum.rclone.org/t/rclone-has-been-banned-from-amaz
 If you happen to know anyone who works at Amazon then please ask them
 to re-instate rclone into the Amazon Drive developer program - thanks!
 
-## Setup
+## Configuration
 
 The initial setup for Amazon Drive involves getting a token from
 Amazon which you need to do in your browser.  `rclone config` walks
@@ -125,7 +125,7 @@ To copy a local directory to an Amazon Drive directory called backup
 
     rclone copy /home/source remote:backup
 
-### Modified time and MD5SUMs ###
+### Modified time and MD5SUMs
 
 Amazon Drive doesn't allow modification times to be changed via
 the API so these won't be accurate or used for syncing.
@@ -133,7 +133,7 @@ the API so these won't be accurate or used for syncing.
 It does store MD5SUMs so for a more accurate sync, you can use the
 `--checksum` flag.
 
-#### Restricted filename characters
+### Restricted filename characters
 
 | Character | Value | Replacement |
 | --------- |:-----:|:-----------:|
@@ -143,7 +143,7 @@ It does store MD5SUMs so for a more accurate sync, you can use the
 Invalid UTF-8 bytes will also be [replaced](/overview/#invalid-utf8),
 as they can't be used in JSON strings.
 
-### Deleting files ###
+### Deleting files
 
 Any files you delete with rclone will end up in the trash.  Amazon
 don't provide an API to permanently delete files, nor to empty the
@@ -151,7 +151,7 @@ trash, so you will have to do that with one of Amazon's apps or via
 the Amazon Drive website. As of November 17, 2016, files are 
 automatically deleted by Amazon from the trash after 30 days.
 
-### Using with non `.com` Amazon accounts ###
+### Using with non `.com` Amazon accounts
 
 Let's say you usually use `amazon.co.uk`. When you authenticate with
 rclone it will take you to an `amazon.com` page to log in.  Your
@@ -284,7 +284,7 @@ See: the [encoding section in the overview](/overview/#encoding) for more info.
 
 {{< rem autogenerated options stop >}}
 
-### Limitations ###
+## Limitations
 
 Note that Amazon Drive is case insensitive so you can't have a
 file called "Hello.doc" and one called "hello.doc".