Adding YAML exampels and sandardizing shell usage for Counter output plugin. Part of issue #1899.

Signed-off-by: Eric D. Schabell <eric@schabell.org>

Author: eschabell

pipeline/outputs/counter.md

@@ -14,15 +14,32 @@ You can run the plugin from the command line or through the configuration file:
 
 From the command line you can let Fluent Bit count up a data with the following options:
 
-```bash
+```shell
 fluent-bit -i cpu -o counter
 ```
 
 ### Configuration File
 
-In your main configuration file append the following Input & Output sections:
+In your main configuration file append the following:
 
-```python
+{% tabs %}
+{% tab title="fluent-bit.yaml" %}
+
+```yaml
+pipeline:
+    inputs:
+        - name: cpu
+          tag: cpu
+          
+    outputs:
+        - name: counter
+          match: '*'
+```
+
+{% endtab %}
+{% tab title="fluent-bit.conf" %}
+
+```text
 [INPUT]
     Name cpu
     Tag  cpu
@@ -32,23 +49,39 @@ In your main configuration file append the following Input & Output sections:
     Match *
 ```
 
+{% endtab %}
+{% endtabs %}
+
 ## Testing
 
 Once Fluent Bit is running, you will see the reports in the output interface similar to this:
 
-```bash
+```shell
 $ bin/fluent-bit -i cpu -o counter -f 1
-Fluent Bit v1.x.x
-* Copyright (C) 2019-2020 The Fluent Bit Authors
-* Copyright (C) 2015-2018 Treasure Data
+
+Fluent Bit v4.0.3
+* Copyright (C) 2015-2025 The Fluent Bit Authors
 * Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
 * https://fluentbit.io
 
-[2017/07/19 11:19:02] [ info] [engine] started
+______ _                  _    ______ _ _             ___  _____ 
+|  ___| |                | |   | ___ (_) |           /   ||  _  |
+| |_  | |_   _  ___ _ __ | |_  | |_/ /_| |_  __   __/ /| || |/' |
+|  _| | | | | |/ _ \ '_ \| __| | ___ \ | __| \ \ / / /_| ||  /| |
+| |   | | |_| |  __/ | | | |_  | |_/ / | |_   \ V /\___  |\ |_/ /
+\_|   |_|\__,_|\___|_| |_|\__| \____/|_|\__|   \_/     |_(_)___/ 
+
+
+[2025/07/11 16:49:57] [ info] [fluent bit] version=4.0.3, commit=37b6e9eda2, pid=52469
+[2025/07/11 16:49:57] [ info] [storage] ver=1.5.3, type=memory, sync=normal, checksum=off, max_chunks_up=128
+[2025/07/11 16:49:57] [ info] [simd    ] disabled
+[2025/07/11 16:49:57] [ info] [cmetrics] version=1.0.3
+[2025/07/11 16:49:57] [ info] [ctraces ] version=0.6.6
+[2025/07/11 16:49:57] [ info] [sp] stream processor started
+[2025/07/11 16:49:57] [ info] [engine] Shutdown Grace Period=5, Shutdown Input Grace Period=2
 1500484743,1 (total = 1)
 1500484744,1 (total = 2)
 1500484745,1 (total = 3)
 1500484746,1 (total = 4)
 1500484747,1 (total = 5)
-```
-
+```