[COST-5607] update whats new in 3.3.2 (#473)

* update whats new in 3.3.2

* text update

* add guidance on updating env variables

* clean up

* apply suggestion and add expected value format for leader election vars

* text update - modify expected format and include default values

docs/csv-description.md

@@ -19,6 +19,25 @@ The Koku Metrics Operator (`koku-metrics-operator`) collects the metrics require
 * PersistentVolumeClaim (PVC) configuration: The KokuMetricsConfig CR can accept a PVC definition and the operator will create and mount the PVC. If one is not provided, a default PVC will be created.
 * Restricted network installation: this operator can function on a restricted network. In this mode, the operator stores the packaged reports for manual retrieval.
 
+## New in v3.3.2:
+* Leader election settings are now configurable via environment variables. These variables can be modified in the operator [Subscription](https://github.com/operator-framework/operator-lifecycle-manager/blob/5a01f50258003e248bd5630df0837fe0bb0f1cb7/doc/design/subscription-config.md). The values should be specified as durations in seconds in the format `<number-of-seconds>s`. The default values for `LEADER_ELECTION_LEASE_DURATION`, `LEADER_ELECTION_RENEW_DEADLINE`, and `LEADER_ELECTION_RETRY_PERIOD` are '60s', '30s', and '5s', respectively.
+
+  ```
+      kind: Subscription
+      metadata:
+      ...
+      spec:
+        ...
+        config:
+          env:
+            - name: LEADER_ELECTION_LEASE_DURATION
+              value: "60s"
+            - name: LEADER_ELECTION_RENEW_DEADLINE
+              value: "30s"
+            - name: LEADER_ELECTION_RETRY_PERIOD
+              value: "5s"
+  ```
+
 ## New in v3.3.1:
 * Optimize memory usage when reading CSV files.