pages/*: prefer brand name and add backticks around commands (#10422)

* pages/*: prefer brand name and add backticks around commands

---------

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/sk.md

@@ -4,15 +4,15 @@
 > Similar to `fzf`.
 > More information: <https://github.com/lotabout/skim>.
 
-- Start skim on all files in the specified directory:
+- Start `skim` on all files in the specified directory:
 
 `find {{path/to/directory}} -type f | sk`
 
-- Start skim for running processes:
+- Start `skim` for running processes:
 
 `ps aux | sk`
 
-- Start skim with a specified query:
+- Start `skim` with a specified query:
 
 `sk --query "{{query}}"`