chore(deps): bump frequenz-floss/gh-action-dependabot-migrate

Bumps [frequenz-floss/gh-action-dependabot-migrate](https://github.com/frequenz-floss/gh-action-dependabot-migrate) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/frequenz-floss/gh-action-dependabot-migrate/releases)
- [Commits](frequenz-floss/gh-action-dependabot-migrate@27763fb...eb100d3)

---
updated-dependencies:
- dependency-name: frequenz-floss/gh-action-dependabot-migrate
  dependency-version: 1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/black-migration.yaml

@@ -66,7 +66,7 @@ jobs:
           # Read/update pull request metadata and labels.
           permission-pull-requests: write
       - name: Migrate
-        uses: frequenz-floss/gh-action-dependabot-migrate@27763fb5eb56476d91abe00132e8a0614171f92f # v1.2.0
+        uses: frequenz-floss/gh-action-dependabot-migrate@eb100d3cf732b4808a7776eee8f303521efd494b # v1.2.1
         with:
           migration-script: |
             import os

.github/workflows/isort-migration.yaml

@@ -69,7 +69,7 @@ jobs:
           # Read/update pull request metadata and labels.
           permission-pull-requests: write
       - name: Migrate
-        uses: frequenz-floss/gh-action-dependabot-migrate@27763fb5eb56476d91abe00132e8a0614171f92f # v1.2.0
+        uses: frequenz-floss/gh-action-dependabot-migrate@eb100d3cf732b4808a7776eee8f303521efd494b # v1.2.1
         with:
           migration-script: |
             import os

.github/workflows/repo-config-migration.yaml

@@ -58,7 +58,7 @@ jobs:
           # Allow pushes when migration changes workflow files.
           permission-workflows: write
       - name: Migrate
-        uses: frequenz-floss/gh-action-dependabot-migrate@27763fb5eb56476d91abe00132e8a0614171f92f # v1.2.0
+        uses: frequenz-floss/gh-action-dependabot-migrate@eb100d3cf732b4808a7776eee8f303521efd494b # v1.2.1
         with:
           script-url-template: >-
             https://raw.githubusercontent.com/frequenz-floss/frequenz-repo-config-python/{version}/cookiecutter/migrate.py