Update miniflux/miniflux Docker tag to v2.2.3

[renovate]

This PR contains the following updates:

Package	Update	Change
miniflux/miniflux (source)	patch	2.2.2 -> 2.2.3

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Release Notes

miniflux/v2 (miniflux/miniflux)

v2.2.3

Compare Source

• fix: unable to change password due to a typo in SQL parameter
• fix: show only one player when there are several audio/video enclosures
• feat(mediaproxy): pass original filename in Content-Disposition header
• feat(mediaproxy): implement referer spoofing for restricted media resources
• feat(integration): update Shiori integration to use new API endpoints for login/bookmark
• build(deps): bump golang.org/x/text from 0.19.0 to 0.20.0
• build(deps): bump golang.org/x/term from 0.25.0 to 0.26.0
• build(deps): bump golang.org/x/oauth2 from 0.23.0 to 0.24.0
• build(deps): bump golang.org/x/net from 0.30.0 to 0.31.0
• build(deps): bump golang.org/x/crypto from 0.28.0 to 0.29.0

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