post-release bumps

[cbm755]

@alexvong243f see here:

https://sourceforge.net/p/octave/package-releases/486/

1. Please post the yaml update
2. bump the versions post-release as per HOWTO-release.md document
3. close 3.0.1 milestone
4. create milestone for 3.0.2, if not already existing.

[cbm755]

by "post-release bumps" I meant something like 6acbe24d07d188b7d047af7d5ebb3fb5167e2936

[alexvong243f]

• [X] Update the https://gnu-octave.github.io/packages/ yaml file

  • [X] see https://github.com/gnu-octave/packages/blob/main/CONTRIBUTING.md

  • [X] send pull request (NOTE: see PR https://github.com/gnu-octave/packages/pull/154)

AFTER release

• [X] Bump version by appending "+" in sympref.m and DESCRIPTION. (NOTE: see PR #1205)

• Optionally, update the make_windows_bundle script. DEPRECATED.

---

1. [X] close 3.0.1 milestone (NOTE: already closed)
2. [X] create milestone for 3.0.2, if not already existing. (NOTE: already existing)

[alexvong243f]

PR https://github.com/gnu-octave/packages/pull/154 was merged in https://github.com/gnu-octave/packages/commit/04ea6104776f10bce80a6311f3bdbdf8a4edab7f and PR #1205 was merged in 1252eec1d43ffc2f0fc0d0d731e18718781f2498