docs: extdedup has selector support

README.md

@@ -42,7 +42,7 @@
 | [excel](/src/cmd/excel.rs#L2)<br>🚀 | Exports a specified Excel/ODS sheet to a CSV file. |
 | [exclude](/src/cmd/exclude.rs#L2)<br>📇👆 | Removes a set of CSV data from another set based on the specified columns.  |
 | [explode](/src/cmd/explode.rs#L2)<br>🔣👆 | Explode rows into multiple ones by splitting a column value based on the given separator.  |
-| [extdedup](/src/cmd/extdedup.rs#L2)<br> | Remove duplicate rows from an arbitrarily large CSV/text file using a memory-mapped, [on-disk hash table](https://crates.io/crates/odht). Unlike the `dedup` command, this command does not load the entire file into memory nor does it sort the deduped file. |
+| [extdedup](/src/cmd/extdedup.rs#L2)<br>👆 | Remove duplicate rows from an arbitrarily large CSV/text file using a memory-mapped, [on-disk hash table](https://crates.io/crates/odht). Unlike the `dedup` command, this command does not load the entire file into memory nor does it sort the deduped file. |
 | [extsort](/src/cmd/extsort.rs#L2)<br>🚀 | Sort an arbitrarily large CSV/text file using a multithreaded [external merge sort](https://en.wikipedia.org/wiki/External_sorting) algorithm. |
 | [fetch](/src/cmd/fetch.rs#L3)<br>✨🧠🌐 | Fetches data from web services for every row using **HTTP Get**. Comes with [HTTP/2](https://http2-explained.haxx.se/en/part1) [adaptive flow control](https://medium.com/coderscorner/http-2-flow-control-77e54f7fd518), [jql](https://github.com/yamafaktory/jql#%EF%B8%8F-usage) JSON query language support, dynamic throttling ([RateLimit](https://www.ietf.org/archive/id/draft-ietf-httpapi-ratelimit-headers-06.html)) & caching with available persistent caching using [Redis](https://redis.io/) or a disk-cache. |
 | [fetchpost](/src/cmd/fetchpost.rs#L3)<br>✨🧠🌐 | Similar to `fetch`, but uses **HTTP Post**. ([HTTP GET vs POST methods](https://www.geeksforgeeks.org/difference-between-http-get-and-post-methods/)) |