Automated Feature Gates Update (#460)

Auto-generated PR from daily feature gates check

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Noah Gundotra <ngundotra@users.noreply.github.com>

Author: github-actions[bot]

app/utils/feature-gate/featureGates.json

@@ -104,7 +104,7 @@
     "version": "v2.1.6",
     "testnetActivationEpoch": 745,
     "devnetActivationEpoch": 820,
-    "mainnetActivationEpoch": null,
+    "mainnetActivationEpoch": 744,
     "title": "Add new unwritable reserved accounts",
     "description": "Allow core developers to exclude system programs from write-locking transactions",
     "simd_link": "https://github.com/solana-foundation/solana-improvement-documents/blob/main/proposals/0105-dynamic-reserved-accounts-set.md"