fix Slack link

updated to correct invalid link from issue #150 - thanks @Arjun-3105 for notifying!

Signed-off-by: adam herzog [email protected]

docs/source/contributing.rst

@@ -10,14 +10,15 @@ or comments. Here a few resources to get started:
     * Find one you are interested in and check out its open **Issues**
 2) If you have specific questions browse through our documentation here:
     https://aboutcode.readthedocs.io/en/latest/
+
     * Depending on the project, there may be a separate ReadTheDocs website
     * Not finding what you were looking for or still have questions?
     Open an issue on the relevant repository or ask directly via Gitter or Slack
 
 You can always interact with the AboutCode community on Gitter_ and Slack_.
 
 .. _Gitter: https://gitter.im/aboutcode-org/discuss
-.. _Slack: https://join.slack.com/t/aboutcode-org/shared_invite/zt-2hjzc448i-SZULSuI0~h6YNSUnBWlAqA
+.. _Slack: https://join.slack.com/t/aboutcode-org/shared_invite/zt-1paqwxccw-IuafuiAvYJFkTqGaZsC1og
 
 
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