Update caching-your-github-credentials-in-git.md (#9046)

Author: pierrebai

content/get-started/getting-started-with-git/caching-your-github-credentials-in-git.md

@@ -61,6 +61,12 @@ Once you've authenticated successfully, your credentials are stored in the Windo
 
 {% endwarning %}
 
+{% warning %}
+
+**Warning:** If you cached incorrect or outdated credentials in Credential Manager for Windows, Git will fail to access {% data variables.product.product_name %}. To reset your cached credentials so that Git prompts you to enter your credentials, access the Credential Manager in the Windows Control Panel under User Accounts > Credential Manager. Look for the {% data variables.product.product_name %} entry and delete it. 
+
+{% endwarning %}
+
 {% endwindows %}
 
 {% linux %}