fix: casing in graphmw changelog

[snigdha920]

Summary by Sourcery

Documentation:

• Correct the casing of key benefits in the changelog.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request corrects the casing of key benefits in the simplified subgraph deployment changelog.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Correct casing of key benefits	Changed "Simplified Architecture" to "Simplified architecture" Changed "Cost Efficiency" to "Cost efficiency" Changed "Enhanced Flexibility" to "Enhanced flexibility"	releases/2025-01-02-simplified-subgraph-deployment.md

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[sourcery-ai]

Hey @snigdha920 - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Review instructions: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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