Fix README formatting (kubernetes-sigs#1927)

cmd/importer/README.md

@@ -2,7 +2,7 @@
 
 A tool able to import existing pods into kueue.
 
-## Cluster setup.
+## Cluster setup
 
 The importer should run in a cluster having the Kueue CRDs defined and in which the `kueue-controller-manager` is not running or has the `pod` integration framework disabled. Check Kueue's [installation guide](https://kueue.sigs.k8s.io/docs/installation/) and [Run Plain Pods](https://kueue.sigs.k8s.io/docs/tasks/run_plain_pods/#before-you-begin) for details.
 
@@ -11,6 +11,7 @@ For an import to succeed, all the involved Kueue objects (LocalQueues, ClusterQu
 ## Build
 
 From kueue source root run:
+
  ```bash
 make importer-build
 
@@ -21,6 +22,7 @@ make importer-build
 The command runs against the systems default kubectl configuration. Check the [kubectl documentation](https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/) to learn more about how to Configure Access to Multiple Clusters.
 
 ### Check
+
 The importer will perform following checks:
 
 - At least one `namespace` is provided.
@@ -61,6 +63,7 @@ It's done providing an yaml mapping file name as `--queuemapping-file` argument,
 - `skip: true` can be used to ignore the pods matching a rule.
 
 ### Import
+
 After which, if `--dry-run=false` was specified, for each selected Pod the importer will:
 
 - Update the Pod's Kueue related labels.
@@ -74,10 +77,13 @@ After which, if `--dry-run=false` was specified, for each selected Pod the impor
 ```bash
 ./bin/importer import -n ns1,ns2 --queuelabel=src.lbl --queuemapping=src-val=user-queue,src-val2=user-queue2 --dry-run=false
 ```
+
  Will import all the pods in namespace `ns1` or `ns2` having the label `src.lbl` set in LocalQueues `user-queue` or `user-queue2` depending on `src.lbl` value.
 
- #### Advanced mapping
+#### Advanced mapping
+
  With mapping file:
+
 ```yaml
 - match:
     labels:
@@ -97,8 +103,7 @@ After which, if `--dry-run=false` was specified, for each selected Pod the impor
 
  Will import all the pods in namespace `ns1` or `ns2` having the label `src.lbl` set to `src-val` in LocalQueue `user-queue` regardless of their priorityClassName and those with `src.lbl==src-val2` ,`src2.lbl==src2-val` and `priorityClassName==p-class`in `user-queue2`.
 
-
-#### Run in cluster
+### Run in cluster
 
 `cmd/importer/run-in-cluster` provides the necessary kustomize manifests needed to run the importer from within the cluster.
 
@@ -117,6 +122,7 @@ Make the created image accessible by your cluster.
 Note: Importer images will be available in `gcr.io/k8s-staging-kueue/importer` soon.
 
 And run
+
 ```bash
 (cd cmd/importer/run-in-cluster && kustomize edit set image importer=<image:tag>)
 ```