Fix typo in fork-testing.md (#2790)

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## Checklist

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docs/src/snforge-advanced-features/fork-testing.md

@@ -65,7 +65,7 @@ the same fork in tests.
 ```toml
 [[tool.snforge.fork]]
 name = "SEPOLIA_LATEST"
-url = "https://starknet-sepolia.public.blastapi.iol/rpc/v0_7"
+url = "https://starknet-sepolia.public.blastapi.io/rpc/v0_7"
 block_id.tag = "latest"
 ```