feat: Ensure all pages have proper descriptions (#2752)

Signed-off-by: blacklight447 <niek@privacyguides.org>
Signed-off-by: kimg45 <138676274+kimg45@users.noreply.github.com>
Signed-off-by: Daniel Gray <dngray@privacyguides.org>

blog/category/announcements.md

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+---
+description: The latest announcements and updates from the Privacy Guides team.
+---
+
+# Announcements
+
+Follow this page for the latest updates & announcements from the Privacy Guides team, and join the [announcements category](https://discuss.privacyguides.net/c/announcements/5) on our forum to discuss anything you read here!

blog/category/news.md

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+---
+description: Privacy Guides News presents the latest tech news about the world's best (and occasionally worst) software, hardware, and services in the privacy world.
+---
+
+# News
+
+The latest tech news about the world's best (and occasionally worst) software, hardware, and services in the privacy world. *Privacy Guides News* has you covered for any important information you might need on your privacy journey.

blog/category/reviews.md

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+---
+description: Read the latest privacy product reviews and stories from Privacy Guides contributing writers.
+---
+
+# Reviews
+
+Looking for alternatives to privacy-invasive apps you use everyday? Do you just want to know all the details behind your favorite privacy tools? *Privacy Guides Reviews* is the place to find all that and more. This is your one stop to find the latest advice and recommendations on things we use every day directly from Privacy Guides contributors.