fix: loki dependency on sn-platform (#1206)

<!--
### Contribution Checklist

- Name the pull request in the form "[charts/<chart-name>] Title of the
pull request".
Skip *[charts/<chart-name>]* if the PR doesn't change a specific chart.
E.g. `[docs] Fix typo in README`.

- Fill out the template below to describe the changes contributed by the
pull request. That will give reviewers the context they need to do the
review.

- Each pull request should address only one issue, not mix up code from
multiple issues.

  - Each commit in the pull request has a meaningful commit message

- Once all items of the checklist are addressed, remove the above text
and this checklist, leaving only the filled out template below.

**(The sections below can be removed for hotfixes of typos)**
-->

*(If this PR fixes a github issue, please add `Fixes #<xyz>`.)*

Fixes #<xyz>

*(or if this PR is one task of a github issue, please add `Master Issue:
#<xyz>` to link to the master issue.)*

Master Issue: #<xyz>

### Motivation

*Explain here the context, and why you're making that change. What is
the problem you're trying to solve.*

### Modifications

*Describe the modifications you've done.*

### Verifying this change

- [x] Make sure that the change passes the CI checks.

*(Please pick either of the following options)*

This change is a trivial rework / code cleanup without any test
coverage.

*(or)*

This change is already covered by existing tests, such as *(please
describe tests)*.

*(or)*

This change added tests and can be verified as follows:

*(example:)*
- *Added integration tests for end-to-end deployment with large payloads
(10MB)*
  - *Extended integration test for recovery after broker failure*

### Documentation

Check the box below.

Need to update docs?

- [ ] `doc-required`

  (If you need help on updating docs, create a doc issue)

- [x] `no-need-doc`

  (Please explain why)

- [ ] `doc`

  (If this PR contains doc changes)

---------

Signed-off-by: ericsyh <[email protected]>
(cherry picked from commit a37bc0a)

Author: ericsyh

charts/sn-platform/requirements.yaml

@@ -18,11 +18,11 @@
 #
 
 dependencies:
-- name: loki-stack
-  version: 0.36.1
+- name: loki
+  version: 0.31.1
   repository: https://grafana.github.io/helm-charts
   condition: monitoring.loki
 #- name: superset
 #  version: 0.1.1
 #  repository:  https://apache.github.io/superset
-#  condition: components.superset
+#  condition: components.superset