Merge ~mthaddon/charm-k8s-mattermost/+git/charm-k8s-mattermost:readme-charm-location into charm-k8s-mattermost:master

[Tom Haddon]

Update location of docs on charmhub now charm location has changed

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 prod-jenkaas-is (prod-jenkaas-is)]

A CI job is currently in progress. A follow up comment will be added when it completes.

[🤖 prod-jenkaas-is (prod-jenkaas-is)]

PASSED: Continuous integration, rev:1f328959ddc9f460e7ad30a4e3de97f7b4b479c8
https://jenkins.canonical.com/is/job/lp-charm-k8s-mattermost-ci/6/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/is/job/lp-charm-test/74/
    None: https://jenkins.canonical.com/is/job/lp-update-mp/86026/

Click here to trigger a rebuild:
https://jenkins.canonical.com/is/job/lp-charm-k8s-mattermost-ci/6//rebuild

review: Approve (continuous-integration)

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 6bc3857319e71b6ee4760f11aac9e76df7734723

diff --git a/README.md b/README.md
index 461b0f7..4a7ef53 100644
--- a/README.md
+++ b/README.md
@@ -31,4 +31,4 @@ your Mattermost instance, and you'll be presented with a screen to create an
 initial admin account. Further accounts must be created using this admin account, or by
 setting up an external authentication source, such as SAML.
 
-For further details, [see here](https://charmhub.io/mattermost/docs).
+For further details, [see here](https://charmhub.io/mattermost-charmers-mattermost/docs).