automation: Update matrix-elementweb Docker tag to v1.11.43

This MR contains the following updates:

Package	Update	Change
matrix-elementweb	patch	v1.11.42 -> v1.11.43

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Release Notes

vector-im/element-web (matrix-elementweb)

v1.11.43

Compare Source

(No changes - bumping the version number for an element-desktop release.)

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