Assign in dependabot; repo check on publish

Author: dalito

.github/dependabot.yml

@@ -7,3 +7,5 @@ updates:
   directory: "/"
   schedule:
     interval: "monthly"
+  assignees:
+    - "dalito"

.github/workflows/pypi-publish.yml

@@ -15,6 +15,7 @@ on:
 jobs:
   build:
     name: Build Python 🐍 distributions 📦 for publishing
+    if: github.repository == 'dalito/ucumvert'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332