Fix spelling and grammar mistakes

This PR corrects misspellings identified by the check-spelling action.

The misspellings have been reported at jsoref/php-src@b6ba3e2#commitcomment-48946465

The action reports that the changes in this PR would make it happy: jsoref/php-src@602417c

Closes GH-6822.

Author: jsoref

CODING_STANDARDS.md

@@ -3,7 +3,7 @@
 This file lists several standards that any programmer adding or changing code in
 PHP should follow. Since this file was added at a very late stage of the
 development of PHP v3.0, the code base does not fully follow it, but new
-features are going in that general direction. Many sections have been recoded to
+features are going in that general direction. Many sections have been rewritten to
 use these rules.
 
 ## Code implementation

NEWS

@@ -78,7 +78,7 @@ PHP                                                                        NEWS
 - MySQLnd:
   . Fixed bug #80761 (PDO uses too much memory). (Nikita)
 
-- Opcache:
+- OPcache:
   . Added inheritance cache. (Dmitry)
 
 - OpenSSL: