Update src/content/docs/en/developers/guides/running-a-scroll-node.mdx

Co-authored-by: isabellewei <[email protected]>

Author: jonastheis

src/content/docs/en/developers/guides/running-a-scroll-node.mdx

@@ -154,7 +154,7 @@ Run `l2geth` with the `--da.sync` flag. Provide blob APIs and beacon node with
 
 Strictly speaking only one of the blob providers is necessary, but during testing blobscan and blocknative were not fully reliable. That's why using a beacon node with historical blob data is recommended (can be additionally to blobscan and blobnative).
 
-### mainnet
+### Mainnet
 ```bash
 ./build/bin/geth --scroll \
 --datadir "tmp/mainnet-l2geth-datadir" \