Update Helm release nextcloud-onlyoffice to v0.7.20

See merge request stackspin/stackspin!924

Update Helm release metallb to v2.6.10

See merge request stackspin/stackspin!919

Update Helm release mariadb to v10.4.4

See merge request stackspin/stackspin!923

Update Helm release loki to v2.10.2

See merge request stackspin/stackspin!917

Update dependency sphinx to v4.5.0

See merge request stackspin/stackspin!920

Update Helm release wordpress to v0.6.12

See merge request stackspin/stackspin!914

Update Helm release velero to v2.29.1

See merge request stackspin/stackspin!913

Resolve "Upgrade zulip to 5.0rc1"

Closes #1183

See merge request stackspin/stackspin!900

Resolve "Nextcloud cronjobs are not running"

Closes #1171

See merge request stackspin/stackspin!912

Documentation amendments and adjustments

Closes #1189

See merge request stackspin/stackspin!903

Update Helm release cert-manager to v1.7.2

See merge request stackspin/stackspin!911

Update Helm release nextcloud-onlyoffice to v0.7.16

See merge request stackspin/stackspin!910

Dummy job template

See merge request stackspin/stackspin!909

Update Helm release nextcloud-onlyoffice to v0.7.14

See merge request stackspin/stackspin!907

Update Helm release wordpress to v0.6.10

See merge request stackspin/stackspin!906

Resolve "PVC deletion in restore instructions"

Closes #1194

See merge request stackspin/stackspin!905

Update Helm release velero to v2.29.0

See merge request stackspin/stackspin!825

- As advised on stackspin/stackspin#1180 (comment 38590)
- Introduces sembr
- Stops overabuse of inline code-formatting for variable names and the like

Fixes issue with wrongly-spelled `venv` dir.