Fix two small documentation issues (#3297)

* Fix typo in configuration example

* Fix link in development docs

* Add changelog fragment

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/changelog/3297.doc.rst

@@ -0,0 +1 @@
+- Fix typo in configuration example and fix broken link to code style guide. - by :user:`srenfo`

docs/config.rst

@@ -1061,7 +1061,7 @@ Or reset override and append to that (note the first override is ``=`` and not `
 Set CLI flags via environment variables
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 All CLI flags can be set via environment variables too, the naming convention here is ``TOX_<option>``. E.g.
-``TOX_WORKDIR`` sets the ``--workdir`` flag, or ``TOX_OVERRIDE`` sets the ``--override`` flag. For flags accepting more
+``TOX_WORK_DIR`` sets the ``--workdir`` flag, or ``TOX_OVERRIDE`` sets the ``--override`` flag. For flags accepting more
 than one argument, use the ``;`` character to separate these values:
 
 .. code-block:: bash

docs/development.rst

@@ -8,7 +8,7 @@ If you're already experienced with submitting GitHub PRs to open-source Python p
 points you need to know about this project. (If you're not, you should carefully read all the documentation after this
 section. This section contains only highlights; it's not a substitute for reading this entire file.)
 
-- Check the `style guide <#style-guide>`_ below. Note that ``tox -e fix`` will not catch the following:
+- Check the `style guide <#code-style-guide>`_ below. Note that ``tox -e fix`` will not catch the following:
 
   - Lines wrapped at less than 120 characters. Lines should be wrapped at 120 characters, not the PEP-8 standard of 79.
   - Variable names should be at least two characters long.