Typo in 3.12's curl APKBUILD

In this commit from 2 weeks ago, entries were added in secfixes for CVE's. However, the corresponding version was not added to the yaml, so the yaml is invalid. Instead of

# secfixes:
#     - CVE-2021-22897
#     - CVE-2021-22898
#     - CVE-2021-22901
#   7.76.0-r0:
#     - CVE-2021-22876
...

It should be

# secfixes:
#   7.76.1-r0:       #This is the added line
#     - CVE-2021-22897
#     - CVE-2021-22898
#     - CVE-2021-22901
#   7.76.0-r0:
#     - CVE-2021-22876
...

This is causing secdb.alpinelinux to no longer report on curl CVEs in 3.12.