Clarify the path to access the Preferences window from the Tools menu

[LucyJimenez]

The documentation for Spyder often lacks clear instructions on how to open the 'Preferences' window from the 'Tools' menu on the main toolbar. This can lead to confusion among users, especially newcomers. We need to provide straightforward steps for accessing the 'Preferences' window to enhance user experience.

Examples where the issue is observed:

• Example 1
• Example 2

Instructions should be provided for both Linux/MacOS and Microsoft Windows to ensure clarity and accuracy in the documentation.