docs: fix codespell issues

docs/sources/installation/configuration.md

@@ -482,7 +482,7 @@ Set api_url to the resource that returns [OpenID UserInfo](https://connect2id.co
 
 First set up Grafana as an OpenId client "webapplication" in Okta. Then set the Base URIs to `https://<grafana domain>/` and set the Login redirect URIs to `https://<grafana domain>/login/generic_oauth`.
 
-Finaly set up the generic oauth module like this:
+Finally set up the generic oauth module like this:
 ```bash
 [auth.generic_oauth]
 name = Okta

docs/sources/installation/docker.md

@@ -12,7 +12,7 @@ weight = 4
 
 # Installing using Docker
 
-Grafana is very easy to install and run using the offical docker container.
+Grafana is very easy to install and run using the official docker container.
 
 ```bash
 $ docker run -d -p 3000:3000 grafana/grafana

docs/sources/installation/upgrading.md

@@ -25,7 +25,7 @@ Before upgrading it can be a good idea to backup your Grafana database. This wil
 
 If you use sqlite you only need to make a backup of your `grafana.db` file. This is usually located at `/var/lib/grafana/grafana.db` on unix system.
 If you are unsure what database you use and where it is stored check you grafana configuration file. If you
-installed grafana to custom location using a binary tar/zip it is usally in `<grafana_install_dir>/data`.
+installed grafana to custom location using a binary tar/zip it is usually in `<grafana_install_dir>/data`.
 
 #### mysql