chore(renovate): Update Open-Xchange

This MR contains the following updates:

Package	Type	Update	Change
appsuite-public-sector/charts/appsuite-public-sector	Open-Xchange	minor	2.5.3 -> 2.7.42
appsuite-public-sector/core-guidedtours	Open-Xchange	patch	8.6.3 -> 8.6.4
appsuite-public-sector/core-ui	Open-Xchange	minor	8.23.2 -> 8.25.3
appsuite-public-sector/core-ui-middleware	Open-Xchange	patch	2.0.3 -> 2.0.4
appsuite-public-sector/core-user-guide	Open-Xchange	minor	8.23.941932 -> 8.25.995780
appsuite-public-sector/documentconverter	Open-Xchange	minor	8.23.43 -> 8.25.44
appsuite-public-sector/guard-ui	Open-Xchange	minor	8.23.0 -> 8.25.0
appsuite-public-sector/imageconverter	Open-Xchange	minor	8.23.43 -> 8.25.44
appsuite-public-sector/middleware-public-sector	Open-Xchange	minor	8.23.47 -> 8.25.47

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