Fixing yaml in rpm build

Author: djw8605

.github/workflows/build-rpm.yml

@@ -15,8 +15,8 @@ jobs:
     steps:
     - name: Build RPM
       uses: mmornati/docker-mock-rpmbuilder@master
-      env = {
-        SPEC_FILE = "rpm/scitokens-cpp.spec"
-        SOURCES = $GITHUB_WORKSPACE
-        MOCK_CONFIG = "epel-7-x86_64"
-      }
+      env:
+        SPEC_FILE: "rpm/scitokens-cpp.spec"
+        SOURCES: $GITHUB_WORKSPACE
+        MOCK_CONFIG: "epel-7-x86_64"
+