docs: pipeline: fix classic config key casing to Title_Case

[eschabell]

Classic config examples for plugins should use Title_Case keys, but several were authored with lowercase keys copied from their YAML tabs. Fix plain keys while leaving dotted/namespaced keys lowercase per convention.

• Input plugins updated: elasticsearch, fluentbit-metrics, kubernetes-events, node-exporter-metrics, process-exporter-metrics, prometheus-remote-write, prometheus-scrape-metrics, tail, windows-exporter-metrics
• Filter plugins updated: grep (parsers_file), kubernetes (aws_use_pod_association, set_platform)

Summary by CodeRabbit

• Documentation
  • Updated Fluent Bit configuration examples across input and filter guides to use consistent capitalization and formatting for section headers and directives.
  • Improved clarity and consistency for service, input, and output configuration snippets without changing their example values or behavior.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e7f1563e-b501-4c54-8f0e-7156893d4be4

📥 Commits

Reviewing files that changed from the base of the PR and between a391227 and 7bce435.

📒 Files selected for processing (11)

• pipeline/filters/grep.md
• pipeline/filters/kubernetes.md
• pipeline/inputs/elasticsearch.md
• pipeline/inputs/fluentbit-metrics.md
• pipeline/inputs/kubernetes-events.md
• pipeline/inputs/node-exporter-metrics.md
• pipeline/inputs/process-exporter-metrics.md
• pipeline/inputs/prometheus-remote-write.md
• pipeline/inputs/prometheus-scrape-metrics.md
• pipeline/inputs/tail.md
• pipeline/inputs/windows-exporter-metrics.md

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📝 Walkthrough

Walkthrough

Fluent Bit documentation examples were reformatted to use capitalized, underscored configuration directives across filter, input, output, service, and metrics configuration snippets. Existing values, metric selections, and example structures remain unchanged.

Changes

Configuration example updates

Layer / File(s)	Summary
Filter configuration directives pipeline/filters/grep.md, pipeline/filters/kubernetes.md	Filter examples use capitalized directive names such as Parsers_File, Aws_Use_Pod_Association, and Set_Platform.
Input and output configuration directives pipeline/inputs/elasticsearch.md, pipeline/inputs/fluentbit-metrics.md, pipeline/inputs/kubernetes-events.md, pipeline/inputs/node-exporter-metrics.md, pipeline/inputs/process-exporter-metrics.md, pipeline/inputs/prometheus-*.md, pipeline/inputs/tail.md	Input, output, and service snippets use capitalized and aligned configuration keys while retaining their existing values and block structures.
Windows metrics configuration directives pipeline/inputs/windows-exporter-metrics.md	Windows exporter examples update service, input, and output directive casing and formatting while preserving metric selections and counter definitions.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• fluent/fluent-bit-docs#2511: Updates the same parsers_file directive casing convention.
• fluent/fluent-bit-docs#2515: Applies similar casing changes to filter documentation examples.
• fluent/fluent-bit-docs#2446: Updates Fluent Bit documentation examples to use capitalized configuration keys.

Suggested labels: 5.0

Suggested reviewers: patrick-stephens, cosmo0920, alexakreizinger

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: updating classic pipeline config examples to Title_Case keys.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[eschabell]

@patrick-stephens bit of maintenance on all the plugins.... ready for review!