fix some typos (#12498)

Signed-off-by: cui fliter <imcusg@gmail.com>

CHANGELOG.md

@@ -63,7 +63,7 @@ improvements for testing. #10991
 * [FEATURE] Promtool: Add HTTP client configuration to query commands. #11487
 * [FEATURE] Scrape: Add `scrape_config_files` to include scrape configs from different files. #12019
 * [FEATURE] HTTP client: Add `no_proxy` to exclude URLs from proxied requests. #12098
-* [FEATURE] HTTP client: Add `proxy_from_enviroment` to read proxies from env variables. #12098
+* [FEATURE] HTTP client: Add `proxy_from_environment` to read proxies from env variables. #12098
 * [ENHANCEMENT] API: Add support for setting lookback delta per query via the API. #12088
 * [ENHANCEMENT] API: Change HTTP status code from 503/422 to 499 if a request is canceled. #11897
 * [ENHANCEMENT] Scrape: Allow exemplars for all metric types. #11984

web/ui/react-app/public/index.html

@@ -42,7 +42,7 @@
     -->
     <!--
         The TITLE_PLACEHOLDER magic value is replaced during serving by Prometheus.
-        We need it dynamic because it can be overriden by the command line flag `web.page-title`.
+        We need it dynamic because it can be overridden by the command line flag `web.page-title`.
     -->
     <title>TITLE_PLACEHOLDER</title>
   </head>

web/ui/react-app/src/contexts/ThemeContext.tsx

@@ -9,7 +9,7 @@ export interface ThemeCtx {
   setTheme: (t: themeSetting) => void;
 }
 
-// defaults, will be overriden in App.tsx
+// defaults, will be overridden in App.tsx
 export const ThemeContext = React.createContext<ThemeCtx>({
   theme: 'light',
   userPreference: 'auto',