revises clustering best practices for load balancing (#4709)

Resolves a typo and orders words in a sentence properly

Author: tto11y

docs/sources/get-started/clustering.md

@@ -60,7 +60,7 @@ Refer to the component reference documentation to check if a component supports
 
 ### Avoid issues with disproportionately large targets
 
-When your environment has a mix of very large and average-sized targets, avoid running too cluster many instances. While clustering generally does a good job of sharding targets to achieve balanced workload distribution, significant target size disparity can lead to uneven load distribution. When you have a few disproportionately large targets among many instances, the nodes assigned these large targets will experience much higher load compard to others (e.g. samples/second in case of Prometheus metrics), potentially causing uneven load balancing or hitting resource limitations. In these scenarios, it's often better to scale vertically rather than horizontally to reduce the impact of outlier large targets. This approach ensures more consistent resource utilization across your deployment and prevents overloading specific instances.
+When your environment has a mix of very large and average-sized targets, avoid running too many cluster instances. While clustering generally does a good job of sharding targets to achieve balanced workload distribution, significant target size disparity can lead to uneven load distribution. When you have a few disproportionately large targets among many instances, the nodes assigned these large targets will experience much higher load compared to others (e.g. samples/second in case of Prometheus metrics), potentially causing uneven load balancing or hitting resource limitations. In these scenarios, it's often better to scale vertically rather than horizontally to reduce the impact of outlier large targets. This approach ensures more consistent resource utilization across your deployment and prevents overloading specific instances.
 
 ### Use `--cluster.wait-for-size`, but with caution