Docs: Fix spellcheck

docs/sources/configuration/index.md

@@ -36,7 +36,7 @@ To add new Zabbix data source open _Data Sources_ in side panel, click _Add data
     will increase Grafana performance.
   - **After**: time after which trends will be used.
         Best practice is to set this value to your history storage period (7d, 30d, etc). Default is **7d** (7 days).
-        You can set the time in Grafana format. Valid time specificators are:
+        You can set the time in Grafana format. Valid time specifiers are:
     - **h** - hours
     - **d** - days
     - **M** - months

docs/sources/installation/index.md

@@ -5,7 +5,7 @@ page_description: Installation instructions for Grafana-Zabbix.
 
 ## Choosing plugin version
 
-Currently (in version `4.x.x`) Grafana-Zabbix plugin supports Zabbix versions `4.x` and `5.x`. Zabbix `3.x` is not supported anymore. Generally, latest plugin should work with latest Grafana version, but if you have any compatibility issue, try to downgrade to previous minor release of Grafana. It's also helpful to report (but use search first to avoid duplicating issues) compatibility issues to the [GitHub](https://github.com/alexanderzobnin/grafana-zabbix/issues).
+Currently (in version `4.x.x`) Grafana-Zabbix plugin supports Zabbix versions `4.x` and `5.x`. Zabbix `3.x` is not supported anymore. Generally, latest plugin should work with latest Grafana version, but if you have any compatibility issue, try to downgrade to previous minor release of Grafana. It's also helpful to report (but use search first to avoid duplicating issues) compatibility issues to the [GitHub](https://github.com/grafana/grafana-zabbix/issues).
 
 ## Using grafana-cli tool
 
@@ -32,13 +32,10 @@ Read more about installing plugins in [Grafana docs](https://grafana.com/docs/pl
 
 ## From github releases
 
-Starting from version 4.0, each plugin release on GitHub contains packaged plugin. To install it, go to [releases](https://github.com/alexanderzobnin/grafana-zabbix/releases) page, pick release you want to get and click on `Assests`. Built plugin packaged into `zip` archive having name `alexanderzobnin-zabbix-app-x.x.x.zip`. Download it, unpack into your Grafana plugins directory and restart grafana server. Each plugin package contains [digital signature](https://grafana.com/docs/grafana/latest/plugins/plugin-signatures/) which allows Grafana to verify that plugin was published by it's owner and files are not modified.
+Starting from version 4.0, each plugin release on GitHub contains packaged plugin. To install it, go to [releases](https://github.com/grafana/grafana-zabbix/releases) page, pick release you want to get and click on `Assets`. Built plugin packaged into `zip` archive having name `alexanderzobnin-zabbix-app-x.x.x.zip`. Download it, unpack into your Grafana plugins directory and restart grafana server. Each plugin package contains [digital signature](https://grafana.com/docs/grafana/latest/plugins/plugin-signatures/) which allows Grafana to verify that plugin was published by it's owner and files are not modified.
 
 **Note**: `since` plugin version 4.0, `grafana-cli` downloads plugin from GitHub release. So downloading plugin package manually, you get the same package as via `grafana-cli`.
 
-## From github repo
-**WARNING!** This way doesn't work anymore (`dist/` folder was removed from git). Use `grafana-cli` or build plugin from sources.
-
 ## Building from sources
 
 If you want to build a package yourself, or contribute - read [building instructions](./run_from_master).

docs/sources/reference/functions.md

@@ -63,7 +63,7 @@ calculation use `rate()`.
 rate()
 ```
 Calculates the per-second rate of increase of the time series. Resistant to counter reset. Suitable for converting of
-growing counters into the per-sercond rate.
+growing counters into the per-second rate.
 
 ---