Fix typos

[radarhere]

Pillow/src/PIL/WmfImagePlugin.py

Lines 83 to 87 in 680e686

	# check placable header
	s = self.fp.read(44)
	if s.startswith(b"\xd7\xcd\xc6\x9a\x00\x00"):
	# placeable windows metafile

The header is 'placeable'. See https://learn.microsoft.com/en-us/windows/win32/api/gdiplusmetaheader/ns-gdiplusmetaheader-wmfplaceablefileheader or https://en.wikipedia.org/wiki/Windows_Metafile#WMF

[hugovk]

There's an "implemetation" in docs/handbook/third-party-plugins.rst if you want to fix that at the same time.

[radarhere]

Sure, I've updated the commit.