cosmetics nginx sample config (#3385)

- fix typo
- fix spaces
- full sentence

Not tests required since no functional change happens

### Pull Request Checklist

<!-- Please read
https://matrix-org.github.io/dendrite/development/contributing before
submitting your pull request -->

* [x] I have added Go unit tests or [Complement integration
tests](https://github.com/matrix-org/complement) for this PR _or_ I have
justified why this PR doesn't need tests
* [x] Pull request includes a [sign off below using a legally
identifiable
name](https://matrix-org.github.io/dendrite/development/contributing#sign-off)
_or_ I have already signed off privately

Signed-off-by: `Werner <werner@armbian.com>`

[skip CI]

1 files changed, 4 insertions, 3 deletions

diff --git a/docs/nginx/dendrite-sample.conf b/docs/nginx/dendrite-sample.conf
index 360eb925..e45fe168 100644
--- a/docs/nginx/dendrite-sample.conf
+++ b/docs/nginx/dendrite-sample.conf
@@ -1,5 +1,5 @@
-#change IP to location of monolith server
-upstream monolith{
+# change IP to location of monolith server
+upstream monolith {
     server 127.0.0.1:8008;
 }
 server {
@@ -20,8 +20,9 @@ server {
     }
 
     location /.well-known/matrix/client {
-        # If your sever_name here doesn't match your matrix homeserver URL
+        # If your server_name here doesn't match your matrix homeserver URL
         # (e.g. hostname.com as server_name and matrix.hostname.com as homeserver URL)
+        # uncomment the following line.
         # add_header Access-Control-Allow-Origin '*';
         return 200 '{ "m.homeserver": { "base_url": "https://my.hostname.com" } }';
     }