docs: minor typo and grammar fixes

docs/admin/Advanced-Installations.md

@@ -105,5 +105,5 @@ This will get diffs from the replication server, import diffs and index the data
 
 ## Verification and further setup
 
-Instructions for import verification and other details like importing Wikidata can be found in [import page](Import.md)
+Instructions for import verification and other details like importing Wikidata can be found in the [import section](Import.md)
 

docs/admin/Update.md

@@ -17,7 +17,7 @@ Run (as the same user who will later run the updates):
 pip3 install --user osmium
 ```
 
-Nominatim needs a tool called `pyosmium-get-updates` which comes with
+Nominatim needs a tool called `pyosmium-get-changes` which comes with
 Pyosmium. You need to tell Nominatim where to find it. Add the
 following line to your `settings/local.php`:
 

docs/develop/Documentation.md

@@ -9,7 +9,7 @@ pip3 install --user mkdocs
 ```
 
 If `mkdocs` can't be found after the installation, the $PATH might have not
-be set correctly yet. Try opening a new terminal session.
+been set correctly yet. Try opening a new terminal session.
 
 
 Then go to the build directory and run