Rename tag CUSTOM to Custom.

[Thisara-Welmilla]

Issue:

• Issue related to tags of user defined authenticators product-is#22058

Rename the CUSTOM tag to Custom

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12378053466

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.64%. Comparing base (8960263) to head (691edd7).
Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6216      +/-   ##
============================================
+ Coverage     45.62%   45.64%   +0.01%     
- Complexity    14039    14085      +46     
============================================
  Files          1632     1631       -1     
  Lines        100525   101493     +968     
  Branches      17538    17763     +225     
============================================
+ Hits          45861    46322     +461     
- Misses        47977    48468     +491     
- Partials       6687     6703      +16     

Flag	Coverage Δ
unit	28.30% <ø> (+0.03%)	⬆️

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[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12378053466
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/12378053466