Add Paaster as a Pastebin recommendation

[WardPearce]

Changes proposed in this PR:

• Adding Paaster.io as a recommended Pastebin under the productivity section.

• I have disclosed any relevant conflicts of interest in my post.
• I agree to grant Privacy Guides a perpetual, worldwide, non-exclusive, transferable, royalty-free, irrevocable license with the right to sublicense such rights through multiple tiers of sublicensees, to reproduce, modify, display, perform, relicense, and distribute my contribution as part of this project.
• I am the sole author of this work.
• I agree to the Community Code of Conduct.

I'm the owner & lead developer of Paaster, Source code.

Paaster is a secure and user-friendly pastebin application that prioritizes privacy and simplicity. With end-to-end encryption and paste history, Paaster ensures that your pasted code remains confidential and accessible.

Relevant forum post

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[WardPearce]

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