Merge pull request #935 from Macbet/fix/fluentbitSplunkDoc

fix(doc): fluentbit splunk output docs

Author: benjaminhuo

docs/plugins/fluentbit/index.md

@@ -1,40 +1,40 @@
 - [ClusterInput](../../fluentbit.md#ClusterInput)
   - [dummy](input/dummy.md)
-  - [tail](input/tail.md)
-  - [systemd](input/systemd.md)
-  - [node exporter metrics](input/node-exporter-metrics.md)
   - [fluentbit metrics](input/fluentbit-metrics.md)
+  - [node exporter metrics](input/node-exporter-metrics.md)
   - [prometheus scrape metrics](input/prometheus-scrape-metrics.md)
+  - [systemd](input/systemd.md)
+  - [tail](input/tail.md)
 - [ClusterParser](../../fluentbit.md#ClusterParser)
   - [json](parser/json.md)
   - [logfmt](parser/logfmt.md)
   - [lstv](parser/lstv.md)
   - [regex](parser/regex.md)
 - [ClusterFilter](../../fluentbit.md#ClusterFilter)
+  - [aws](filter/aws.md)
+  - [grep](filter/grep.md)
   - [kubernetes](filter/kubernetes.md)
+  - [lua](filter/lua.md)
   - [modify](filter/modify.md)
+  - [multiline](filter/multiline.md)
   - [nest](filter/nest.md)
   - [parser](filter/parser.md)
-  - [grep](filter/grep.md)
   - [record modifier](filter/recordmodifier.md)
-  - [lua](filter/lua.md)
   - [throttle](filter/throttle.md)
-  - [aws](filter/aws.md)
-  - [multiline](filter/multiline.md)
 - [ClusterOutput](../../fluentbit.md#ClusterOutput)
+  - [datadog](output/datadog.md)
   - [elasticsearch](output/elasticsearch.md)
   - [file](output/file.md)
+  - [firehose](output/firehose.md)
   - [forward](output/forward.md)
   - [http](output/http.md)
   - [kafka](output/kafka.md)
-  - [null](output/null.md)
-  - [stdout](output/stdout.md)
-  - [tcp](output/tcp.md)
   - [loki](output/loki.md)
-  - [syslog](output/syslog.md)
-  - [datadog](output/datadog.md)
-  - [firehose](output/firehose.md)
+  - [null](output/null.md)
   - [opensearch](output/opensearch.md)
   - [opentelemetry](output/opentelemetry.md)
   - [prometheus remote write](output/prometheus-remote-write.md)
-
+  - [splunk](output/splunk.md)
+  - [stdout](output/stdout.md)
+  - [syslog](output/syslog.md)
+  - [tcp](output/tcp.md)