Help: Add versionadded markup to target_sources FILE_SET feature

This was accidentally left out of commit 4b0ee4e338 (Help: Add
documentation for target_sources(FILE_SET) and associated properties,
2021-07-02).

Help/command/install.rst

@@ -205,6 +205,8 @@ that may be installed:
   ``RESOURCE`` files. See :prop_tgt:`RESOURCE` for details.
 
 ``FILE_SET <set>``
+  .. versionadded:: 3.23
+
   If the file set ``<set>`` exists and is ``PUBLIC`` or ``INTERFACE``, any
   files added to the file set ``<set>`` created by
   :command:`target_sources(FILE_SET)` are installed in the specified

Help/command/target_sources.rst

@@ -60,6 +60,11 @@ expressions to ensure the sources are correctly assigned to the target.
 See the :manual:`cmake-buildsystem(7)` manual for more on defining
 buildsystem properties.
 
+File Sets
+^^^^^^^^^
+
+.. versionadded:: 3.23
+
 .. code-block:: cmake
 
   target_sources(<target>

Help/prop_tgt/HEADER_DIRS.rst

@@ -1,6 +1,8 @@
 HEADER_DIRS
 -----------
 
+.. versionadded:: 3.23
+
 Semicolon-separated list of base directories of the default header set created
 by :command:`target_sources(FILE_SET)`. This property supports
 :manual:`generator expressions <cmake-generator-expressions(7)>`.

Help/prop_tgt/HEADER_DIRS_NAME.rst

@@ -1,6 +1,8 @@
 HEADER_DIRS_<NAME>
 ------------------
 
+.. versionadded:: 3.23
+
 Semicolon-separated list of base directories of the header set with name
 ``<NAME>`` created by :command:`target_sources(FILE_SET)`. This property
 supports :manual:`generator expressions <cmake-generator-expressions(7)>`.

Help/prop_tgt/HEADER_SET.rst

@@ -1,6 +1,8 @@
 HEADER_SET
 ----------
 
+.. versionadded:: 3.23
+
 Semicolon-separated list of headers in the default header set created by
 :command:`target_sources(FILE_SET)`. This property supports
 :manual:`generator expressions <cmake-generator-expressions(7)>`. If any of the

Help/prop_tgt/HEADER_SETS.rst

@@ -1,6 +1,8 @@
 HEADER_SETS
 -----------
 
+.. versionadded:: 3.23
+
 List of ``PRIVATE`` and ``PUBLIC`` header sets added by
 :command:`target_sources(FILE_SET)`. Headers listed in these header sets are
 treated as source files for the purposes of IDE integration.

Help/prop_tgt/HEADER_SET_NAME.rst

@@ -1,6 +1,8 @@
 HEADER_SET_<NAME>
 -----------------
 
+.. versionadded:: 3.23
+
 Semicolon-separated list of headers in the named header set ``<NAME>`` created
 by :command:`target_sources(FILE_SET)`. This property supports
 :manual:`generator expressions <cmake-generator-expressions(7)>`. If any of the

Help/prop_tgt/INTERFACE_HEADER_SETS.rst

@@ -1,6 +1,8 @@
 INTERFACE_HEADER_SETS
 ---------------------
 
+.. versionadded:: 3.23
+
 List of ``INTERFACE`` and ``PUBLIC`` header sets added by
 :command:`target_sources(FILE_SET)`. Headers listed in these header sets can be
 installed with :command:`install(TARGETS)` and exported with