build: update appdata.xml version in release commit

Adding the version we just released in the "version bump" commit is
useless, since that means the actual release only reports the old
version.

Closes #15362

[skip ci]

scripts/release.sh

@@ -12,6 +12,7 @@
 #     - CMakeLists.txt: Unset NVIM_VERSION_PRERELEASE
 #     - CMakeLists.txt: Unset NVIM_API_PRERELEASE
 #     - Create test/functional/fixtures/api_level_N.mpack
+#     - Add date and version to runtime/nvim.appdata.xml
 #     - Tag the commit.
 #   Create the "version bump" commit:
 #     - CMakeLists.txt: Set NVIM_VERSION_PRERELEASE to "-dev"
@@ -62,6 +63,10 @@ _do_release_commit() {
     git add test/functional/fixtures/api_level_$__API_LEVEL.mpack
   fi
 
+  $__sed -i.bk 's,(<releases>),\1\
+    <release date="'"${__DATE}"'" version="'"${__VERSION}"'"/>,' runtime/nvim.appdata.xml
+  git add runtime/nvim.appdata.xml
+
   if ! test "$ARG1" = '--use-current-commit' ; then
     echo "Building changelog since ${__LAST_TAG}..."
 
@@ -75,14 +80,12 @@ _do_release_commit() {
 _do_bump_commit() {
   $__sed -i.bk 's/(NVIM_VERSION_PRERELEASE) ""/\1 "-dev"/' CMakeLists.txt
   $__sed -i.bk 's/set\((NVIM_VERSION_PATCH) [[:digit:]]/set(\1 ?/' CMakeLists.txt
-  $__sed -i.bk 's,(<releases>),\1\
-    <release date="'"${__DATE}"'" version="xxx"/>,' runtime/nvim.appdata.xml
   rm CMakeLists.txt.bk
   rm runtime/nvim.appdata.xml.bk
   nvim +'/NVIM_VERSION' +1new +'exe "norm! iUpdate version numbers!!!"' \
-    -O CMakeLists.txt runtime/nvim.appdata.xml
+    -O CMakeLists.txt
 
-  git add CMakeLists.txt runtime/nvim.appdata.xml
+  git add CMakeLists.txt
   git commit -m "$__BUMP_MSG"
 }
 
@@ -92,11 +95,7 @@ fi
 _do_bump_commit
 echo "
 Next steps:
-    - Update runtime/nvim.appdata.xml on _master_
     - Run tests/CI (version_spec.lua)!
     - Push the tag:
         git push --follow-tags
-    - Update the 'stable' tag:
-        git push --force upstream HEAD^:refs/tags/stable
-        git fetch --tags
     - Update website: index.html"