UPGRADING: fix some typos [skip ci] (#17701)

Author: DanielEScherzer

UPGRADING

@@ -155,7 +155,7 @@ PHP 8.5 UPGRADE NOTES
 
 - Session:
   . session_start is stricter in regard of the option argument.
-    it throws a ValueError if the whole is not a hashmap or
+    It throws a ValueError if the whole is not a hashmap or
     a TypeError if read_on_close value is not a valid type
     compatible with int.
 
@@ -170,7 +170,7 @@ PHP 8.5 UPGRADE NOTES
   . socket_create_listen, socket_bind and socket_sendto throw a
     ValueError if the port is lower than 0 or greater than 65535,
     also if any of the hints array entry is indexes numerically.
-  . socket_addrinfo_lookup throw a TypeError if any of the hints
+  . socket_addrinfo_lookup throws a TypeError if any of the hints
     values cannot be cast to a int and can throw a ValueError if
     any of these values overflow.
   . socket_set_option with MCAST_LEAVE_GROUP/MCAST_LEAVE_SOURCE_GROUP