Normalize pkgs block scalar style to |

Author: mtfishman

.github/workflows/IntegrationTest.yml

@@ -18,7 +18,7 @@ jobs:
     secrets: "inherit"
     with:
       localregistry: "https://github.com/ITensor/ITensorRegistry.git"
-      pkgs: |-
+      pkgs: |
         [
               "https://github.com/ITensor/Tennis.jl"
-            ]
+            ]