chore(deps): update actions/cache action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	major	v2 -> v4

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Release Notes

actions/cache (actions/cache)

v4

Compare Source

v3

Compare Source

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Configuration

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[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 52.7%, saving 380.17 KB.

Filename	Before	After	Improvement	Visual comparison
template/public/img/uploads/atelie-construindo-o-som.webp	156.54 KB	62.81 KB	-59.9%	View diff
template/public/img/uploads/grid-banner_03_glocks.fw.png	416.66 KB	200.09 KB	-52.0%	View diff
template/public/img/uploads/grid-banner_03_glocks.fw.webp	79.61 KB	13.11 KB	-83.5%	View diff
template/public/img/uploads/homeconstruindo.webp	41.97 KB	39.93 KB	-4.9%	View diff
template/public/img/uploads/kalimbas_grid.webp	15.68 KB	15.06 KB	-3.9%	View diff
template/public/img/uploads/tambor-de-fenda_grid.webp	11.59 KB	10.88 KB	-6.1%	View diff

27 images did not require optimisation.

[renovate]

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