chore(deps): update golang:1.26-alpine docker digest to c2a1f7b

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
golang	stage	digest	2389ebf → c2a1f7b

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[github-actions]

➡️ Go test coverage stayed the same at 0.0% compared to 0826079

⚠️ 15 of 15 packages have zero coverage.

• github.com/Depado/goploader/client
• github.com/Depado/goploader/client/conf
• github.com/Depado/goploader/client/screenshot
• github.com/Depado/goploader/server
• github.com/Depado/goploader/server/conf
• github.com/Depado/goploader/server/curl
• github.com/Depado/goploader/server/database
• github.com/Depado/goploader/server/logger
• github.com/Depado/goploader/server/metrics
• github.com/Depado/goploader/server/models
• github.com/Depado/goploader/server/monitoring
• github.com/Depado/goploader/server/router
• github.com/Depado/goploader/server/setup
• github.com/Depado/goploader/server/utils
• github.com/Depado/goploader/server/views

⛔ Coverage does not meet minimum requirement of 0%.

No change in coverage for any package.

View coverage for all packages

# Package Name                                  | Coverage
- github.com/Depado/goploader/client            |     0.0%
- github.com/Depado/goploader/client/conf       |     0.0%
- github.com/Depado/goploader/client/screenshot |     0.0%
- github.com/Depado/goploader/server            |     0.0%
- github.com/Depado/goploader/server/conf       |     0.0%
- github.com/Depado/goploader/server/curl       |     0.0%
- github.com/Depado/goploader/server/database   |     0.0%
- github.com/Depado/goploader/server/logger     |     0.0%
- github.com/Depado/goploader/server/metrics    |     0.0%
- github.com/Depado/goploader/server/models     |     0.0%
- github.com/Depado/goploader/server/monitoring |     0.0%
- github.com/Depado/goploader/server/router     |     0.0%
- github.com/Depado/goploader/server/setup      |     0.0%
- github.com/Depado/goploader/server/utils      |     0.0%
- github.com/Depado/goploader/server/views      |     0.0%