fix duplicate typo error in url param

Description

the curl is errorenous - contains a duplicate url param "?" - the curl is defective currently and most likely returns a false on tag detection, making the script fail with the misleading "Missing "vendor/lineage", aborting" if the given tag doesn't exist as branch too

the typo originated probably from discussion with @nicofonk on my own PR, leading to changing the url to a better endpoint, but introducing the duplicate "?"

Issue(s)

Test environment

• just using curl

Test procedures

• run an example curl with a known to exist tag

# proper

$ curl -s https://gitlab.e.foundation/api/v4/projects/659/repository/tags?search=v1.12.3-s | jq -r ".[].name" | grep -q "v1.12.3-s"
$ echo $?
0

# faulty

$ curl -s https://gitlab.e.foundation/api/v4/projects/659/repository/tags?search?v1.12.3-s | jq -r ".[].name" | grep -q "v1.12.3-s"
$ echo $?
1

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation