Remove missed changeset from 5.1-rc.1 (#5270)

.changeset/yellow-tables-sell.md

@@ -1,5 +0,0 @@
----
-'openzeppelin-solidity': minor
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-
-`SafeERC20`: Document risks of `safeIncreaseAllowance` and `safeDecreaseAllowance` when associated with ERC-7674.