Revert/fix "Update the stuff about beta branches (#655)"

[overlappingd]

This reverts commit 489f297.
(i fucked up. sorry!)

[github-actions]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 46.4%, saving 2.37 MB.

Filename	Before	After	Improvement	Visual comparison
wiki/.assets/images/beginners-guide/bsmanager-mods.png	170.70 KB	147.91 KB	-13.3%	View diff
wiki/.assets/images/beginners-guide/bsmanager-oneclick.png	101.67 KB	68.89 KB	-32.2%	View diff
wiki/.assets/images/mapping/arc-block.png	47.95 KB	32.96 KB	-31.3%	View diff
wiki/.assets/images/mapping/chain-block.png	17.70 KB	13.53 KB	-23.5%	View diff
wiki/.assets/images/mapping/tempora.jpg	206.52 KB	152.86 KB	-26.0%	View diff
wiki/.assets/images/mapping/temporaDownbeatFound.jpg	212.42 KB	156.05 KB	-26.5%	View diff
wiki/.assets/images/mapping/temporaDownbeatPlaced.jpg	213.45 KB	156.79 KB	-26.5%	View diff
wiki/.assets/images/mapping/temporaFullyTimed.jpg	248.70 KB	183.07 KB	-26.4%	View diff
wiki/.assets/images/mapping/temporaGridBar.jpg	3.82 KB	2.43 KB	-36.4%	View diff
wiki/.assets/images/mapping/temporaQuarterNotes.jpg	10.17 KB	7.26 KB	-28.6%	View diff
wiki/.assets/images/mapping/temporaRoughLineUp.jpg	250.33 KB	185.23 KB	-26.0%	View diff
wiki/.assets/images/mapping/temporaSecondDownbeatFound.jpg	205.96 KB	151.07 KB	-26.7%	View diff
wiki/.assets/images/mapping/temporaSecondDownbeatPlaced.jpg	256.70 KB	188.87 KB	-26.4%	View diff
wiki/.assets/images/mapping/temporaSpectrogramSetting.jpg	32.16 KB	23.59 KB	-26.7%	View diff
wiki/.assets/images/mapping/vision-hjd-cm.png	132.43 KB	87.18 KB	-34.2%	View diff
wiki/.assets/images/mapping/vision-hjd-official.png	533.51 KB	445.90 KB	-16.4%	View diff
wiki/.assets/images/modding/pc-mod-bsml-buttons.jpg	52.92 KB	15.65 KB	-70.4%	View diff
wiki/.assets/images/modding/pc-mod-bsml-embeddedresource.jpg	65.81 KB	25.74 KB	-60.9%	View diff
wiki/.assets/images/modding/pc-mod-bsml-file.jpg	12.86 KB	4.94 KB	-61.6%	View diff
wiki/.assets/images/modding/pc-mod-bsml-floating-screen.jpg	90.27 KB	30.28 KB	-66.5%	View diff
wiki/.assets/images/modding/pc-mod-bsml-settings.jpg	93.70 KB	34.31 KB	-63.4%	View diff
wiki/.assets/images/modding/pc-mod-bsml-tabs.jpg	232.44 KB	68.93 KB	-70.3%	View diff
wiki/.assets/images/modding/pc-mod-console-testing.png	27.92 KB	17.77 KB	-36.3%	View diff
wiki/.assets/images/modding/pc-mod-ilspy-analyze.jpg	39.68 KB	15.18 KB	-61.8%	View diff
wiki/.assets/images/modding/pc-mod-ilspy-code.jpg	41.64 KB	16.18 KB	-61.1%	View diff
wiki/.assets/images/modding/pc-mod-ilspy-list.jpg	37.24 KB	15.88 KB	-57.4%	View diff
wiki/.assets/images/modding/pc-mod-ilspy-search.jpg	99.02 KB	39.98 KB	-59.6%	View diff
wiki/.assets/images/modding/pc-mod-references-rider.png	9.00 KB	6.86 KB	-23.8%	View diff
wiki/.assets/images/modding/pc-mod-rider-decompiling.jpg	42.85 KB	16.56 KB	-61.4%	View diff
wiki/.assets/images/modding/pc-mod-rue1.jpg	175.59 KB	67.77 KB	-61.4%	View diff
wiki/.assets/images/modding/pc-mod-rue2.jpg	226.84 KB	109.13 KB	-51.9%	View diff
wiki/.assets/images/modding/pc-mod-tutorial-event-analyze.jpg	33.66 KB	13.31 KB	-60.5%	View diff
wiki/.assets/images/modding/pc-mod-tutorial-menu.jpg	15.16 KB	10.72 KB	-29.3%	View diff
wiki/.assets/images/modding/pc-mod-tutorial-pool-analyze.jpg	29.44 KB	11.71 KB	-60.2%	View diff
wiki/.assets/images/modding/pc-mod-tutorial-test.jpg	85.69 KB	70.67 KB	-17.5%	View diff
wiki/.assets/images/modding/testing-beat-saber-debug.jpg	985.85 KB	70.21 KB	-92.9%	View diff
wiki/.assets/images/modding/testing-unity-hub.png	116.62 KB	78.60 KB	-32.6%	View diff
wiki/.assets/images/modding/testing-unity-playbackengine.png	67.31 KB	56.97 KB	-15.4%	View diff

704 images did not require optimisation.

Update required: Update image-actions configuration to the latest version before 1/1/21. See README for instructions.