Add DataFusion 44.0.0 blog post

content/blog/2024-12-07-datafusion-44.0.0.md

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+---
+layout: post
+title: Apache DataFusion 44.0.0 Release
+date: 2024-12-07
+author: pmc
+categories: [release]
+---
+
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+
+The Apache DataFusion PMC is pleased to announce version 44.0.0.
+
+TODO: add some content here
+
+Topics:
+Finalize StringView
+Finalize UserDefined window functions
+
+Performance: 43 blog post about perf and thne mention Additional grouping vectorization 
+
+Highlight performance / hardening of multi group by
+
+Focusing on stability 
+
+Looking forward to the new year: XXX