Fix regex for extracting version number from tag

[labkey-tchad]

Rationale

We want to support special tags to merge changes into monthly release branches:

╰─$ echo $TAG
26.3._26.4

Having two different version numbers in the release tag is throwing off the logic that determines the release version:

╰─$ echo "$TAG" | grep -oE '([0-9]+\.[0-9]+)'
26.3
26.4

Limiting it to the beginning of the tag does the trick:

╰─$ echo "$TAG" | grep -oE '(^[0-9]+\.[0-9]+)'
26.3

Related Pull Requests

• Allow automated merge forward to target monthly releases #27

Changes

• Fix regex for extracting version number from tag