Update the image tag to main-snapshot

Image tag = 0.1.0-SNAPSHOT dosent exist in the apache/spark-kubernetes-operator repo. Because of the spark-kubernetes-operator was in crashloopback off state.

Author: vladwa

build-tools/helm/spark-kubernetes-operator/values.yaml

@@ -14,9 +14,9 @@
 # limitations under the License.
 
 image:
-  repository: spark-kubernetes-operator
+  repository: apache/spark-kubernetes-operator
   pullPolicy: IfNotPresent
-  tag: 0.1.0-SNAPSHOT
+  tag: main-snapshot
   # If image digest is set then it takes precedence and the image tag will be ignored
   # digest: ""