fix minor spelling mistakes

doc/administration/auth/ldap.md

@@ -302,7 +302,7 @@ OU=GitLab, Inc,DC=gitlab,DC=com
 
 This character needs to be escaped as documented in [RFC 4515](https://tools.ietf.org/search/rfc4515).
 
-Due to the way the string is parsed, the special character needs to be convered
+Due to the way the string is parsed, the special character needs to be converted
 to hex and `\\5C\\` (`5C` = `\` in hex) added before it.
 As an example the above DN would look like
 

doc/install/requirements.md

@@ -82,11 +82,11 @@ errors during usage.
 
 We recommend having at least 2GB of swap on your server, even if you currently have
 enough available RAM. Having swap will help reduce the chance of errors occurring
-if your available memory changes. We also recommend [configuring the kernels swappiness setting](https://askubuntu.com/a/103916)
+if your available memory changes. We also recommend [configuring the kernel's swappiness setting](https://askubuntu.com/a/103916)
 to a low value like `10` to make the most of your RAM while still having the swap
 available when needed.
 
-Notice: The 25 workers of Sidekiq will show up as separate processes in your process overview (such as top or htop) but they share the same RAM allocation since Sidekiq is a multithreaded application. Please see the section below about Unicorn workers for information about many you need of those.
+Notice: The 25 workers of Sidekiq will show up as separate processes in your process overview (such as top or htop) but they share the same RAM allocation since Sidekiq is a multithreaded application. Please see the section below about Unicorn workers for information about how many you need of those.
 
 ## Database