fix url issue buttons (#319)

Author: bellet

.github/ISSUE_TEMPLATE/config.yml

@@ -5,7 +5,7 @@ contact_links:
     url: http://contrib.scikit-learn.org/metric-learn/
     about: Much help can be found in the docs
   - name: Ask a question
-    url: https://github.com/sklearn-contrib/metric-learn/discussions/new
+    url: https://github.com/scikit-learn-contrib/metric-learn/discussions/new
     about: Ask a question or start a discussion about metric-learn
   - name: Stack Overflow
     url: https://stackoverflow.com
@@ -14,5 +14,5 @@ contact_links:
     url: https://stats.stackexchange.com
     about: Please ask and answer metric learning questions (use cases, algorithms & theory...) on Cross Validated
   - name: Blank issue
-    url: https://github.com/sklearn-contrib/metric-learn/issues/new
+    url: https://github.com/scikit-learn-contrib/metric-learn/issues/new
     about: Please note that Github Discussions should be used in most cases instead