chore(renterd): update ghcr.io/siafoundation/renterd docker tag to v2.9.3

[github-actions]

This PR contains the following updates:

Package	Update	Change
ghcr.io/siafoundation/renterd	patch	2.9.0 -> 2.9.3

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Release Notes

SiaFoundation/renterd (ghcr.io/siafoundation/renterd)

v2.9.3

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Fixes

• Add GET /pinned/*key OpenAPI spec

v2.9.2

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Fixes

• Check gouging settings in upload and download clients.
• Disable pprof by default
• Fixed a deadlock in the transport pool caused by closing a mux connection while holding the pool mutex.
• Update mux to v1.5.1.
• Update reedsolomon dependency to 1.14.0.

v2.9.1

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Fixes

• Add smoke tests for renterd binary to ensure basic startup is covered on the CI.
• Fix a bug where contracts weren't renewed due to invalid signatures.
• Fixed an edge case where pruning a contract might delete a wrong sector.

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