Update collector version (#1119)

Co-authored-by: atoulme <[email protected]>

examples/enable-operator-and-auto-instrumentation/rendered_manifests/operator/instrumentation.yaml

@@ -35,12 +35,12 @@ spec:
       - name: OTEL_RESOURCE_ATTRIBUTES
         value: splunk.zc.method=autoinstrumentation-apache-httpd:1.0.3
   dotnet:
-    image: ghcr.io/signalfx/splunk-otel-dotnet/splunk-otel-dotnet:1.2.1
+    image: ghcr.io/signalfx/splunk-otel-dotnet/splunk-otel-dotnet:v1.2.1
     env:
       - name: OTEL_DOTNET_AUTO_PLUGINS
         value: "Splunk.OpenTelemetry.AutoInstrumentation.Plugin, Splunk.OpenTelemetry.AutoInstrumentation"
       - name: OTEL_RESOURCE_ATTRIBUTES
-        value: splunk.zc.method=splunk-otel-dotnet:1.2.1
+        value: splunk.zc.method=splunk-otel-dotnet:v1.2.1
       # dotnet auto-instrumentation uses http/proto by default, so data must be sent to 4318 instead of 4317.
       # See: https://github.com/open-telemetry/opentelemetry-operator#opentelemetry-auto-instrumentation-injection
       - name: OTEL_EXPORTER_OTLP_ENDPOINT