Add missing 8.0.0 changelog for datetime functions no longer returning false

In PHP 7.x, several datetime functions returned `false` on parameter
parsing failure. PHP 8.0 changed this to throw `TypeError` instead
(per RFC: Consistent type errors for internal functions).

This changelog entry was already documented for
`DateTimeZone::listIdentifiers`/`timezone_identifiers_list`, but was
missing from the following functions:

- `date()`
- `gmdate()`
- `localtime()`
- `getdate()`
- `date_parse()`
- `date_parse_from_format()`
- `date_sun_info()`

Functions that still return `false` from their own logic (e.g.
`strtotime()`, `mktime()`, `date_create()`) are not included, as the
parameter parsing change is not observable in their return types.

The issue also requests reverting the return value description to
mention `false`, but the old text was inaccurate (non-numeric strings
were coerced to `0`, not rejected) and was intentionally removed in
GH-2130.

Closes #5460

Author: KentarouTakeda

reference/datetime/functions/date-parse-from-format.xml

@@ -123,6 +123,13 @@
        ignored.
       </entry>
      </row>
+     <row>
+      <entry>8.0.0</entry>
+      <entry>
+       This function no longer returns &false; on failure, but throws a
+       <classname>TypeError</classname> instead.
+      </entry>
+     </row>
      <row>
       <entry>7.2.0</entry>
       <entry>

reference/datetime/functions/date-parse.xml

@@ -124,6 +124,13 @@
      </row>
     </thead>
     <tbody>
+     <row>
+      <entry>8.0.0</entry>
+      <entry>
+       This function no longer returns &false; on failure, but throws a
+       <classname>TypeError</classname> instead.
+      </entry>
+     </row>
      <row>
       <entry>7.2.0</entry>
       <entry>

reference/datetime/functions/date-sun-info.xml

@@ -154,6 +154,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.0.0</entry>
+       <entry>
+        This function no longer returns &false; on failure, but throws a
+        <classname>TypeError</classname> instead.
+       </entry>
+      </row>
       <row>
        <entry>7.2.0</entry>
        <entry>

reference/datetime/functions/date.xml

@@ -81,6 +81,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.0.0</entry>
+       <entry>
+        This function no longer returns &false; on failure, but throws a
+        <classname>TypeError</classname> instead.
+       </entry>
+      </row>
       <row>
        <entry>8.0.0</entry>
        <entry>

reference/datetime/functions/getdate.xml

@@ -128,6 +128,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.0.0</entry>
+       <entry>
+        This function no longer returns &false; on failure, but throws a
+        <classname>TypeError</classname> instead.
+       </entry>
+      </row>
       <row>
        <entry>8.0.0</entry>
        <entry>

reference/datetime/functions/gmdate.xml

@@ -58,6 +58,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.0.0</entry>
+       <entry>
+        This function no longer returns &false; on failure, but throws a
+        <classname>TypeError</classname> instead.
+       </entry>
+      </row>
       <row>
        <entry>8.0.0</entry>
        <entry>

reference/datetime/functions/localtime.xml

@@ -124,6 +124,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.0.0</entry>
+       <entry>
+        This function no longer returns &false; on failure, but throws a
+        <classname>TypeError</classname> instead.
+       </entry>
+      </row>
       <row>
        <entry>8.0.0</entry>
        <entry>