Update docs/handbook/security.rst

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: aclark4life

docs/handbook/security.rst

@@ -140,11 +140,12 @@ Denial of service
 **D-1 — Decompression bomb**
 
 A small compressed image can expand to gigabytes in memory.
-:py:data:`PIL.Image.MAX_IMAGE_PIXELS` (~89 MP by default) raises
+:py:data:`PIL.Image.MAX_IMAGE_PIXELS` raises
 ``DecompressionBombError`` at 2× the limit and
 ``DecompressionBombWarning`` at 1×. PNG text chunks are
-separately capped by ``PngImagePlugin.MAX_TEXT_CHUNK`` (1 MiB) and
-``MAX_TEXT_MEMORY`` (64 MiB).
+separately capped by ``PngImagePlugin.MAX_TEXT_CHUNK`` and
+``MAX_TEXT_MEMORY``. Check the values in your installed Pillow version at
+runtime or in the reference/source for the current defaults.
 
 *Mitigations:* **never** set ``Image.MAX_IMAGE_PIXELS = None`` in production;
 treat ``DecompressionBombWarning`` as an error; set OS/container memory limits