Update get-involved.yml

Author: sandragesing

_data/menus/get-involved.yml

@@ -3,7 +3,7 @@
     - name: Join US-RSE
       link: join
     - name: Organizational Membership
-      limk: org_membership
+      limk: org-membership
     - name: Support US-RSE
       link: support
     - name: Get Involved