remove typo in package name (#13)

Aya-S · jorisvandenbossche · commit 1c9fbb3c8554 · 2019-09-26T17:37:49.000+02:00
diff --git a/environment.yml b/environment.yml
@@ -6,6 +6,6 @@ dependencies:
     - packaging
     - conda-build
     - conda-smithy
-    - conda-forge-pinnings
+    - conda-forge-pinning
     - lxml
     - twine
