Merge pull request #18941 from charris/fix-changelog-script

BUG: Make changelog recognize gh- as a PR number prefix.

doc/changelog/1.17.0-changelog.rst

@@ -159,7 +159,7 @@ names contributed a patch for the first time.
 Pull requests merged
 ====================
 
-A total of 531 pull requests were merged for this release.
+A total of 532 pull requests were merged for this release.
 
 * `#4808 <https://github.com/numpy/numpy/pull/4808>`__: ENH: Make the `mode` parameter of np.pad default to 'constant'
 * `#8131 <https://github.com/numpy/numpy/pull/8131>`__: BUG: Fix help() formatting for deprecated functions.
@@ -174,6 +174,7 @@ A total of 531 pull requests were merged for this release.
 * `#10855 <https://github.com/numpy/numpy/pull/10855>`__: ENH: Adding a count parameter to np.unpackbits
 * `#11230 <https://github.com/numpy/numpy/pull/11230>`__: MAINT: More cleanup of einsum
 * `#11233 <https://github.com/numpy/numpy/pull/11233>`__: BUG: ensure i0 does not change the shape.
+* `#11358 <https://github.com/numpy/numpy/pull/11358>`__: MAINT: Rewrite numpy.pad without concatenate
 * `#11684 <https://github.com/numpy/numpy/pull/11684>`__: BUG: Raise when unravel_index, ravel_multi_index are given empty...
 * `#11689 <https://github.com/numpy/numpy/pull/11689>`__: DOC: Add ref docs for C generic types.
 * `#11721 <https://github.com/numpy/numpy/pull/11721>`__: BUG: Make `arr.ctypes.data` hold onto a reference to the underlying...