bin/gen_release_notes: automatically commit release notes

Cc: mesa-stable
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5833>
(cherry picked from commit ae2d045767)

.pick_status.json

@@ -4234,7 +4234,7 @@
         "description": "bin/gen_release_notes: automatically commit release notes",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "master_sha": null,
         "because_sha": null
     },

bin/gen_release_notes.py

@@ -25,6 +25,7 @@ import asyncio
 import datetime
 import os
 import pathlib
+import subprocess
 import sys
 import textwrap
 import typing
@@ -266,6 +267,10 @@ async def main() -> None:
         except:
             print(exceptions.text_error_template().render())
 
+    subprocess.run(['git', 'add', final])
+    subprocess.run(['git', 'commit', '-m',
+                    f'docs: add release notes for {this_version}'])
+
 
 if __name__ == "__main__":
     loop = asyncio.get_event_loop()

docs/releasing.html

@@ -331,7 +331,7 @@ unset VK_ICD_FILENAMES
 <p>
 The release notes are completely generated by the
 <code>bin/gen_release_notes.py</code> script. Simply run this script before
-bumping the version, and commit the results.
+bumping the version.
 
 The only thing left to do is add the sha256 sums.
 </p>