ci: update version

[fluentdo-ci]

Update version

• Created by https://github.com/telemetryforge/agent/actions/runs/21253807583
• Auto-generated by create-pull-request: https://github.com/peter-evans/create-pull-request

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Summary by cubic

Bump Telemetry Forge Agent and Fluent Bit to 26.2.1 across Dockerfiles, setup scripts, CMake, and test scripts. Ensures CI builds and tests the latest release.

^{Written for commit b91e838. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

[coveralls]

Pull Request Test Coverage Report for Build 21253819831

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.001%) to 56.668%

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Files with Coverage Reduction	New Missed Lines	%
src/flb_storage.c	2	73.4%

Totals
Change from base Build 20960579089:	0.001%
Covered Lines:	86706
Relevant Lines:	150997

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💛 - Coveralls