docs(pdk) small consistency change to kong.log.inspect (Kong#6988)

Made log.inspect consistent with the other functions documented here

Author: Tieske

kong/pdk/log.lua

@@ -369,10 +369,6 @@ end
 -- via `kong.log.inspect.off()`, then this function prints nothing, and is
 -- aliased to a "NOP" function in order to save CPU cycles.
 --
--- ``` lua
--- kong.log.inspect("...")
--- ```
---
 -- This function differs from `kong.log()` in the sense that arguments will be
 -- concatenated with a space(`" "`), and each argument will be
 -- "pretty-printed":