Update GeeksforGeeks search endpoint and resolve duplicate templates

[sarthaksahu03]

Updates the GeeksforGeeks bangs to correctly route queries to their new dedicated /search/ endpoint. To fix the CI Duplicate template(s) failure, the extra geeks entry was removed and added as an alias to the gfg entry under the ts property.

[sarthaksahu03]

I've updated the PR to resolve the CI failure.

Since both !geeks and !gfg were pointing to the same GeeksforGeeks search URL endpoint, it was violating the duplicate templates rule. I removed the redundant !geeks entry and added it as an alias (ts) to the !gfg entry. The search string now accurately routes to the /search/?gq={{{s}}} endpoint.