Changed target version for vosi, fixes issue with build

[stvoutsin]

Description:
PR addresses issue where most recent version on main fails to build.
Build run locally using Gradle version 7.6 produces compilation errors:

/app/src/main/java/org/opencadc/tap/ws/TAPWebService.java:85: error: TAPWebService is not abstract and does not override abstract method getStatus() in AvailabilityPlugin
public class TAPWebService implements AvailabilityPlugin {
       ^
/app/src/main/java/org/opencadc/tap/ws/TAPWebService.java:119: error: getStatus() in TAPWebService cannot implement getStatus() in AvailabilityPlugin
    public Availability getStatus() {
                        ^
  return type Availability is not compatible with AvailabilityStatus
/app/src/main/java/org/opencadc/tap/ws/TAPWebService.java:118: error: method does not override or implement a method from a supertype
    @Override

Likely Cause:
Cause seemed to the version of cadc-vosi library that gets imported is in the range of 1.0 - 1.4, though the change to use Availability in the AvailabilityPlugin interface was introduced in a version 1.4.

Relevant PR:
https://rubinobs.atlassian.net/browse/DM-44561

Fix:
Set the target version to >= 1.4.1

[rra]

This doesn't need an approval to merge, but for the record, LGTM.