onnxsim: keep the patch's Upstream-Status tag on one line

ci_scripts/check_patch.py's Upstream-Status regex matches ^Upstream-Status:
*(.*)$ without DOTALL, so it only reads the first physical line after the
tag. The previous commit wrapped the "To upstream [...]" comment across
four lines, which left the bracket unterminated on line one and would have
failed the check. Join it back into a single line, matching every other
patch in this repo (e.g. patches/py-spy/0.4.2/*.patch).

Author: luhenry

patches/onnxsim/0.7.3/0001-tests-pin-ir_version-in-test_profiling-s-foldable-model.patch

@@ -35,10 +35,7 @@ Match the existing convention used throughout the suite (ir_version=10
 regardless of opset) so the fixture stays valid across the wide range
 of onnx versions the unpinned runtime dependency can resolve to.
 
-Upstream-Status: To upstream [no push/issue access to onnxsim/onnxsim from
-this environment - only riseproject-dev/python-wheels is attached; the fix
-is a one-line ir_version pin matching every sibling test file's existing
-convention]
+Upstream-Status: To upstream [no push/issue access to onnxsim/onnxsim from this environment - only riseproject-dev/python-wheels is attached; the fix is a one-line ir_version pin matching every sibling test file's existing convention]
 
 Signed-off-by: Ludovic Henry <git@ludovic.dev>
 ---