Added Major Dependencies Info under Debuging

Signed-off-by: Brian Flores <[email protected]>

DEVELOPER_GUIDE.md

@@ -11,11 +11,12 @@
     - [Run Single-node Cluster Locally](#run-single-node-cluster-locally)
     - [Run Multi-node Cluster Locally](#run-multi-node-cluster-locally)
   - [Debugging](#debugging)
+    - [Major Dependencies](#major-dependencies)
   - [Backwards Compatibility Testing](#backwards-compatibility-testing)
     - [Adding new tests](#adding-new-tests)
   - [Supported configurations](#supported-configurations)
   - [Submitting Changes](#submitting-changes)
-  - [Building on Lucene Version updates](#building-on-lucene-version-updates)
+  - [Building On Lucene Version Updates](#building-on-lucene-version-updates)
 
 # Developer Guide
 
@@ -238,6 +239,12 @@ Additionally, it is possible to attach one debugger to the cluster JVM and anoth
 ./gradlew :integTest -Dtest.debug=1 -Dcluster.debug=1
 ```
 
+#### Major Dependencies
+Currently, the major dependencies that Neural Search depends on are [ML-Commons](https://github.com/opensearch-project/ml-commons) and [K-NN](https://github.com/opensearch-project/k-NN).
+Make sure to check on them when you observe a failure that affects Neural Search.
+See [Building on Lucene Version updates](#building-on-lucene-version-updates) as an example where K-NN caused a build failure.
+Also, please note that it may take time for developers to create a fix for your current dependency issue.
+
 ## Backwards Compatibility Testing
 
 The purpose of Backwards Compatibility Testing and different types of BWC tests are explained [here](https://github.com/opensearch-project/opensearch-plugins/blob/main/TESTING.md#backwards-compatibility-testing). The BWC tests (i.e. Restart-Upgrade, Mixed-Cluster and Rolling-Upgrade scenarios) should be added with any new feature being added to Neural Search.
@@ -304,14 +311,14 @@ run successfully on the PR. For example, if a PR on main needs to be backported
 `backport 2.x` to the PR and make sure the backport workflow runs on the PR along with other checks. Once this PR is
 merged to main, the workflow will create a backport PR to the `2.x` branch.
 
-## Building on Lucene Version updates
+## Building On Lucene Version Updates
 There may be a Lucene version update that can affect your workflow causing errors like
 `java.lang.NoClassDefFoundError: org/apache/lucene/codecs/lucene99/Lucene99Codec` or 
 `Provider org.opensearch.knn.index.codec.KNN910Codec.KNN910Codec could not be instantiated`. In this case
-we can observe there may be an issue with a dependency with [KNN](https://github.com/opensearch-project/k-NN).
+we can observe there may be an issue with a dependency with [K-NN](https://github.com/opensearch-project/k-NN).
 This results in having issues with not being able to do `./gradlew run` or `./gradlew build`.
 
-You can check this [KNN PR](https://github.com/opensearch-project/k-NN/pull/2195) as an example of this event happening or this [Neural Search PR](https://github.com/opensearch-project/neural-search/pull/913#issuecomment-2400189329) that shows a developer going
+You can check this [K-NN PR](https://github.com/opensearch-project/k-NN/pull/2195) as an example of this event happening or this [Neural Search PR](https://github.com/opensearch-project/neural-search/pull/913#issuecomment-2400189329) that shows a developer going
 through the same build issue.
 
 **Follow the steps to remedy the gradle run issue.**