Update Helm release velero to v2.26.3

See merge request stackspin/stackspin!607

Add upgrade instructions and scripts for upgrading OAS clusters to Stackspin clusters

See merge request stackspin/stackspin!614

Update dependency sphinx to v4.3.0

See merge request stackspin/stackspin!615

Resolve "Install helm and kubectl with snap"

Closes #994, #948, and #995

See merge request stackspin/stackspin!613

Closes: #994

Closes: #948

Closes: #995

Resolve "Increase loki mem limits"

Closes #1013

See merge request stackspin/stackspin!606

Update dependency jinja2 to v3.0.3

See merge request stackspin/stackspin!608

Update dependency imagesize to v1.3.0

See merge request stackspin/stackspin!610

Update Helm release kube-prometheus-stack to v20

See merge request stackspin/stackspin!611

Closes: #1013

Update Helm release promtail to v3.9.1

See merge request stackspin/stackspin!605

Update Helm release loki to v2.8.1

See merge request stackspin/stackspin!604

Update Helm release loki to v2.8.0

See merge request stackspin/stackspin!599

fix requirements.txt for docs

See merge request stackspin/stackspin!603

The upgrade to loki 2.4.0 broke this:

    level=error ts=2021-11-08T13:23:21.431348112Z caller=main.go:51 msg="validating config" err="invalid ingester config: the use of the write ahead log (WAL) is incompatible with chunk transfers. It's suggested to use the WAL. Please try setting ingester.max-transfer-retries to 0 to disable transfers"

Fix registry API address

See merge request stackspin/stackspin!602

Update dependency pyparsing to v3.0.5

See merge request stackspin/stackspin!601

Update dependency pycparser to v2.21

See merge request stackspin/stackspin!600

Update dependency py to v1.11.0

See merge request stackspin/stackspin!598