fix homepage in ELPA easyconfigs (due to switch to new domain)

[boegel]

(created using eb --new-pr)

partial fix for #17162 (other part is in #17357 where also source URLs are fixed)

[boegelbot]

@boegel: Tests failed in GitHub Actions, see https://github.com/easybuilders/easybuild-easyconfigs/actions/runs/4192741432
Output from first failing test suite run:

FAIL: test_pr_sha256_checksums (test.easyconfigs.easyconfigs.EasyConfigTest)
Make sure changed easyconfigs have SHA256 checksums in place.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test/easyconfigs/easyconfigs.py", line 963, in test_pr_sha256_checksums
    self.assertTrue(len(checksum_issues) == 0, "No checksum issues:\n%s" % '\n'.join(checksum_issues))
AssertionError: No checksum issues:
Checksums missing for one or more sources/patches in ELPA-2016.05.004-intel-2016b.eb: found 1 sources + 0 patches vs 0 checksums
Checksums missing for one or more sources/patches in ELPA-2016.05.004-intel-2017a.eb: found 1 sources + 1 patches vs 0 checksums

----------------------------------------------------------------------
Ran 16415 tests in 649.131s

FAILED (failures=1)
ERROR: Not all tests were successful

bleep, bloop, I'm just a bot (boegelbot v20200716.01)
Please talk to my owner @boegel if you notice me acting stupid),
or submit a pull request to https://github.com/boegel/boegelbot fix the problem.

[Micket]

source_urls seems to be different as well nowdays?

https://elpa.mpcdf.mpg.de/software/tarball-archive/ELPA_TARBALL_ARCHIVE.html
suggests

https://elpa.mpcdf.mpg.de/software/tarball-archive/Releases/%(version)s/

edit: for the older ones i only i guess. the git release tags should also work for 2017.05.001 onwards

[Micket]

lgtm

[Micket]

Test report by @Micket
SUCCESS
Build succeeded for 2 out of 2 (2 easyconfigs in total)
vera-c2 - Linux Rocky Linux 8.6, x86_64, Intel Xeon Processor (Skylake), Python 3.6.8
See https://gist.github.com/e18988a793974a31b4f0e61b4c945d38 for a full test report.

[Micket]

Going in, thanks @boegel!