Fix example query in pickers.md

As discussed in helix-editor#11218 (comment)

book/src/pickers.md

@@ -6,6 +6,6 @@ Helix has a variety of pickers, which are interactive windows used to select var
 
 Most pickers perform fuzzy matching using [fzf syntax](https://github.com/junegunn/fzf?tab=readme-ov-file#search-syntax). Two exceptions are the global search picker, which uses regex, and the workspace symbol picker, which passes search terms to the LSP. Note that OR operations (`|`) are not currently supported.
 
-If a picker shows multiple columns, you may apply the filter to a specific column by prefixing the column name with `%`. Column names can be shortened to any prefix, so `%p`, `%pa` or `%pat` all mean the same as `%path`. For example, a query of `helix %p .toml$ !lang` in the global search picker searches for the term "helix" within files with paths ending in ".toml" but not including "lang".
+If a picker shows multiple columns, you may apply the filter to a specific column by prefixing the column name with `%`. Column names can be shortened to any prefix, so `%p`, `%pa` or `%pat` all mean the same as `%path`. For example, a query of `helix %p .toml: !lang` in the global search picker searches for the term "helix" within files with paths ending in ".toml" but not including "lang".
 
 You can insert the contents of a [register](./registers.md) using `Ctrl-r` followed by a register name. For example, one could insert the currently selected text using `Ctrl-r`-`.`, or the directory of the current file using `Ctrl-r`-`%` followed by `Ctrl-w` to remove the last path section. The global search picker will use the contents of the [search register](./registers.md#default-registers) if you press `Enter` without typing a filter. For example, pressing `*`-`Space-/`-`Enter` will start a global search for the currently selected text.