seo: cleanup and optimize roadmap(s) metadata (#8828)

* audit first 11 roadmaps

* audit next 10 roadmaps

* audit next 15 roadmaps

* audit last 22 roadmaps

* Update src/data/roadmaps/ai-data-scientist/ai-data-scientist.md

* Update src/data/roadmaps/aspnet-core/aspnet-core.md

* apply suggestions from code review

* fix seo title

* Update src/data/roadmaps/frontend/frontend.md

* Update src/data/roadmaps/backend/backend.md

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Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

src/data/roadmaps/git-github/git-github.md

@@ -22,14 +22,31 @@ seo:
   title: 'Learn Git and GitHub'
   description: 'Learn about Git and GitHub using this roadmap. We also have resources and short descriptions attached to the roadmap items so you can get everything you want to learn in one place.'
   keywords:
-    - 'learn git and github 2024'
+    - 'learn git and github 2025'
     - 'git roadmap'
+    - 'github roadmap'
+    - 'git roadmap 2025'
+    - 'github roadmap 2025'
     - 'learn github'
+    - 'github tutorial'
+    - 'git for beginners'
+    - 'version control'
+    - 'git commands'
+    - 'git vcs roadmap'
+    - 'github features'
+    - 'pull requests'
+    - 'github actions'
+    - 'open source github roadmap'
+    - 'become a git expert'
+    - 'github developer career path'
+    - 'how to use git and github'
+    - 'git github roadmap 2025'
 relatedRoadmaps:
   - 'computer-science'
   - 'frontend'
   - 'backend'
   - 'devops'
+  - 'linux'
   - 'full-stack'
 sitemap:
   priority: 1