doc: rename README.Win32.md to README.windows.md.

That matches the name of the equivalent libpcap document, and doesn't
tie it to 32 bits.  (16-bit Windows is long since dead.)

Author: guyharris

CHANGES

@@ -141,7 +141,8 @@ DayOfTheWeek, Month DD, YYYY / The Tcpdump Group
       tests: Use the -tttt option, by default, for the tests.
       autoconf, CMake: Get the size of a void * and a time_t.
     Documentation:
-      Fixed errors in doc/README.Win32.md.
+      Fixed errors in doc/README.Win32.md and renamed it to
+        README.windows.md.
 
 Friday, April 7, 2023 / The Tcpdump Group
   Summary for 4.99.4 tcpdump release

Makefile.in

@@ -358,7 +358,7 @@ EXTRA_DIST = \
 	doc/README.haiku.md \
 	doc/README.NetBSD.md \
 	doc/README.solaris.md \
-	doc/README.Win32.md \
+	doc/README.windows.md \
 	install-sh \
 	instrument-functions.c \
 	makemib \

README.md

@@ -37,7 +37,7 @@ tcpdump compiles and works on at least the following platforms:
 * [NetBSD](./doc/README.NetBSD.md)
 * OpenBSD
 * [Solaris](./doc/README.solaris.md)
-* [Windows](./doc/README.Win32.md) (requires WinPcap or Npcap, and Visual
+* [Windows](./doc/README.windows.md) (requires WinPcap or Npcap, and Visual
   Studio with CMake)
 
 In the past tcpdump certainly or likely worked on the following platforms: