typo fix (#8345)

Author: helix84

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -292,7 +292,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `INTERVAL`: **60**: Garbage Collection interval (sec), for memory cache only.
 - `HOST`: **\<empty\>**: Connection string for `redis` and `memcache`.
    - Redis: `network=tcp,addr=127.0.0.1:6379,password=macaron,db=0,pool_size=100,idle_timeout=180`
-   - Memache: `127.0.0.1:9090;127.0.0.1:9091`
+   - Memcache: `127.0.0.1:9090;127.0.0.1:9091`
 - `ITEM_TTL`: **16h**: Time to keep items in cache if not used, Setting it to 0 disables caching.
 
 ## Session (`session`)
@@ -521,4 +521,4 @@ Two special environment variables are passed to the render command:
 
 - `SHOW_FOOTER_BRANDING`: **false**: Show Gitea branding in the footer.
 - `SHOW_FOOTER_VERSION`: **true**: Show Gitea version information in the footer.
-- `SHOW_FOOTER_TEMPLATE_LOAD_TIME`: **true**: Show time of template execution in the footer.
+- `SHOW_FOOTER_TEMPLATE_LOAD_TIME`: **true**: Show time of template execution in the footer.