Update nginx.conf.sample

I replaced the `?` characters with `$is_args`. `$is_args` returns `?` if a request line has arguments or an empty string if otherwise.

nginx.conf.sample

@@ -65,7 +65,7 @@ location /update {
 }
 
 location / {
-    try_files $uri $uri/ /index.php?$args;
+    try_files $uri $uri/ /index.php$is_args$args;
 }
 
 location /pub {
@@ -105,7 +105,7 @@ location /static/ {
 }
 
 location /media/ {
-    try_files $uri $uri/ /get.php?$args;
+    try_files $uri $uri/ /get.php$is_args$args;
 
     location ~ ^/media/theme_customization/.*\.xml {
         deny all;
@@ -115,13 +115,13 @@ location /media/ {
         add_header Cache-Control "public";
         add_header X-Frame-Options "SAMEORIGIN";
         expires +1y;
-        try_files $uri $uri/ /get.php?$args;
+        try_files $uri $uri/ /get.php$is_args$args;
     }
     location ~* \.(zip|gz|gzip|bz2|csv|xml)$ {
         add_header Cache-Control "no-store";
         add_header X-Frame-Options "SAMEORIGIN";
         expires    off;
-        try_files $uri $uri/ /get.php?$args;
+        try_files $uri $uri/ /get.php$is_args$args;
     }
     add_header X-Frame-Options "SAMEORIGIN";
 }