[LLDB][Docs] Replace LLDB_RELOCATABLE_PYTHON with LLDB_EMBED_PYTHON_HOME (llvm#81310)

LLDB_RELOCATABLE_PYTHON was removed in LLVM 11
(llvm@3ec3f62).

Author: poyaoc97

lldb/docs/resources/build.rst

@@ -278,12 +278,12 @@ are commonly used on Windows.
   crash, rather than having to reproduce a failure or use a crash dump.
 * ``PYTHON_HOME`` (Required): Path to the folder where the Python distribution
   is installed. For example, ``C:\Python35``.
-* ``LLDB_RELOCATABLE_PYTHON`` (Default=0): When this is 0, LLDB will bind
+* ``LLDB_EMBED_PYTHON_HOME`` (Default=1 on Windows): When this is 1, LLDB will bind
   statically to the location specified in the ``PYTHON_HOME`` CMake variable,
   ignoring any value of ``PYTHONHOME`` set in the environment. This is most
   useful for developers who simply want to run LLDB after they build it. If you
   wish to move a build of LLDB to a different machine where Python will be in a
-  different location, setting ``LLDB_RELOCATABLE_PYTHON`` to 1 will cause
+  different location, setting ``LLDB_EMBED_PYTHON_HOME`` to 0 will cause
   Python to use its default mechanism for finding the python installation at
   runtime (looking for installed Pythons, or using the ``PYTHONHOME``
   environment variable if it is specified).