Fix broken links (#1082)

Signed-off-by: Alexandra Tran <alexandra.tran@consensys.net>

docs/HowTo/Monitor/OpenTelemetry-Collector.md

@@ -7,8 +7,7 @@ description: Collect Besu information with the OpenTelemetry Collector
 You can use the OpenTelemetry monitoring and tracing service to gather node metrics and traces.
 To enable OpenTelemetry to access Hyperledger Besu, use the [`--metrics-enabled`](../../Reference/CLI/CLI-Syntax.md#metrics-enabled)
 and [`--metrics-protocol=opentelemetry`](../../Reference/CLI/CLI-Syntax.md#metrics-protocol) options.
-Use [Splunk APM](https://www.splunk.com/en_us/software/splunk-apm.html) or [Splunk](https://splunk.com) to visualize the
-collected data.
+Use [Splunk](https://splunk.com) to visualize the collected data.
 A [Besu Sync example](https://github.com/splunk/splunk-connect-for-ethereum/tree/master/examples/besu-sync) is available.
 
 !!! example

docs/Tutorials/Merge-Testnet.md

@@ -134,7 +134,7 @@ Specify:
 See the Teku [`--validators-*`](https://docs.teku.consensys.net/en/latest/Reference/CLI/CLI-Syntax/#validator-keys)
 options for more information on running Teku as a validator.
 
-## 6. Check validator status
+## After starting Besu and Teku
 
 After starting Besu and Teku, your node should start syncing and connecting to peers.
 
@@ -160,6 +160,4 @@ After starting Besu and Teku, your node should start syncing and connecting to p
         2022-03-21 20:44:12.353 INFO  - Syncing     *** Target slot: 76096, Head slot: 3519, Remaining slots: 72577, Connected peers: 9
         ```
 
-You can check your validator status by searching your Ethereum address on the
-[Kiln Beacon Chain explorer](https://beaconchain.kiln.themerge.dev/).
-It may take up to multiple days for your validator to reach `active` status.
+It may take up to multiple days for your validator to be activated and start proposing blocks.