docs: skip "Connection" suffix from FTP, SSH/SFTP and HTTP backend names

docs/content/s3.md

@@ -2901,7 +2901,7 @@ r) Rename remote
 c) Copy remote
 s) Set configuration password
 q) Quit config
-e/n/d/r/c/s/q> q                                                                
+e/n/d/r/c/s/q> q
 ```
 
 ### IBM COS (S3)
@@ -2937,7 +2937,7 @@ Choose a number from below, or type in your own value
  	4 / Backblaze B2
    	\ "b2"
 [snip]
-	23 / http Connection
+	23 / HTTP
     \ "http"
 Storage> 3
 ```