Fix typos and English grammar in `update.sh`

German is different in using upper-case than English lol

update.sh

@@ -828,14 +828,14 @@ elif [ $FORCE ]; then
   echo -e "\e[31mPlease rerun the update.sh Script without the --force/-f parameter.\e[0m"
   sleep 1
 elif [ $NEW_BRANCH == "master" ] && [ $CURRENT_BRANCH != "master" ]; then
-  echo -e "\e[33mYou are about to switch your mailcow Updates to the stable (master) branch.\e[0m"
+  echo -e "\e[33mYou are about to switch your mailcow updates to the stable (master) branch.\e[0m"
   sleep 1
-  echo -e "\e[33mBefore you do: Please take a backup of all components to ensure that no Data is lost...\e[0m"
+  echo -e "\e[33mBefore you do: Please take a backup of all components to ensure that no data is lost...\e[0m"
   sleep 1
-  echo -e "\e[31mWARNING: Please see on GitHub or ask in the communitys if a switch to master is stable or not.
-  In some rear cases a Update back to master can destroy your mailcow configuration in case of Database Upgrades etc.
-  Normally a upgrade back to master should be safe during each full release. 
-  Check GitHub for Database Changes and Update only if there similar to the full release!\e[0m"
+  echo -e "\e[31mWARNING: Please see on GitHub or ask in the community if a switch to master is stable or not.
+  In some rear cases an update back to master can destroy your mailcow configuration such as database upgrade, etc.
+  Normally an upgrade back to master should be safe during each full release.
+  Check GitHub for Database changes and update only if there similar to the full release!\e[0m"
   read -r -p "Are you sure you that want to continue upgrading to the stable (master) branch? [y/N] " response
   if [[ ! "${response}" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
     echo "OK. If you prepared yourself for that please run the update.sh Script with the --stable parameter again to trigger this process here."