Rename ZEND_STR_DEPRECATED to ZEND_STR_DEPRECATED_CAPITALIZED (#15831)

To match other capitalized strings like `ZEND_STR_UNKNOWN_CAPITALIZED` and
`ZEND_STR_ARRAY_CAPITALIZED`. Since this known string was only added in PHP
8.4, no backwards compatibility alias is needed.

Author: DanielEScherzer

Zend/zend_string.h

@@ -634,7 +634,7 @@ EMPTY_SWITCH_DEFAULT_CASE()
 	_(ZEND_STR_COUNT,                  "count") \
 	_(ZEND_STR_SENSITIVEPARAMETER,     "SensitiveParameter") \
 	_(ZEND_STR_CONST_EXPR_PLACEHOLDER, "[constant expression]") \
-	_(ZEND_STR_DEPRECATED,             "Deprecated") \
+	_(ZEND_STR_DEPRECATED_CAPITALIZED, "Deprecated") \
 	_(ZEND_STR_SINCE,                  "since") \
 	_(ZEND_STR_GET,                    "get") \
 	_(ZEND_STR_SET,                    "set") \

build/gen_stub.php

@@ -3142,7 +3142,7 @@ public function generateCode(string $invocation, string $nameSuffix, array $allC
             $knowns["SensitiveParameter"] = "ZEND_STR_SENSITIVEPARAMETER";
         }
         if ($php84MinimumCompatibility) {
-            $knowns["Deprecated"] = "ZEND_STR_DEPRECATED";
+            $knowns["Deprecated"] = "ZEND_STR_DEPRECATED_CAPITALIZED";
             $knowns["since"] = "ZEND_STR_SINCE";
         }