docs: fix transactionStatus response objects and update node-reth repo name (#990)

* fix txStatus response objects and update node-reth repo name

* fix enum

Author: roethke

docs/base-chain/flashblocks/apps.mdx

@@ -204,7 +204,7 @@ curl https://sepolia-preconf.base.org -X POST -H "Content-Type: application/json
 
 Subscribe to real-time streams of Flashblocks data via WebSocket. Three subscription types are available:
 
-<Note>Requires node-reth minimum client version v0.3.0</Note>
+<Note>Requires [base/base](https://github.com/base/base) minimum client version v0.3.0</Note>
 
 - **pendingLogs** - Stream logs from transactions in Flashblocks
 - **newFlashblockTransactions** - Stream transaction hashes included in the block
@@ -258,18 +258,29 @@ ws.on('close', () => {
 
 Check whether a transaction is present in the mempool:
 
-<Note>Requires node-reth minimum client version v0.3.0</Note>
+<Note>Requires [base/base](https://github.com/base/base) minimum client version v0.3.0</Note>
 ```
 curl https://sepolia-preconf.base.org -X POST -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","method":"base_transactionStatus","params":["0x..."],"id":1}'
 ```
 
-**Example Response**
+**Transaction Known**
+```
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "result": {
+    "status": "Known"
+  }
+}
+```
+
+**Transaction Unknown**
 ```
 {
   "jsonrpc": "2.0",
   "id": 1,
   "result": {
-    "status": "pending"
+    "status": "Unknown"
   }
 }
 ```