blast_repo fixes (dart-lang/package_config#127)

Dependabot
GitHub Action

pkgs/package_config/.github/dependabot.yml

diff --git a/pkgs/package_config/.github/dependabot.yml b/pkgs/package_config/.github/dependabot.yml
index 430a85e..b2f1dec 100644
--- a/pkgs/package_config/.github/dependabot.yml
+++ b/pkgs/package_config/.github/dependabot.yml
@@ -4,8 +4,7 @@
 version: 2
 updates:
 
-- package-ecosystem: "github-actions"
-  directory: "/"
+- package-ecosystem: github-actions
+  directory: /
   schedule:
-    # Check for updates to GitHub Actions every weekday
-    interval: "daily"
+    interval: monthly

pkgs/package_config/.github/workflows/test-package.yml

diff --git a/pkgs/package_config/.github/workflows/test-package.yml b/pkgs/package_config/.github/workflows/test-package.yml
index 3db1d6c..6b28e85 100644
--- a/pkgs/package_config/.github/workflows/test-package.yml
+++ b/pkgs/package_config/.github/workflows/test-package.yml
@@ -22,8 +22,8 @@
       matrix:
         sdk: [dev]
     steps:
-      - uses: actions/checkout@v3
-      - uses: dart-lang/setup-dart@v1
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+      - uses: dart-lang/setup-dart@6a218f2413a3e78e9087f638a238f6b40893203d
         with:
           sdk: ${{ matrix.sdk }}
       - id: install
@@ -49,8 +49,8 @@
         os: [ubuntu-latest]
         sdk: [2.12.0, dev]
     steps:
-      - uses: actions/checkout@v3
-      - uses: dart-lang/setup-dart@v1
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+      - uses: dart-lang/setup-dart@6a218f2413a3e78e9087f638a238f6b40893203d
         with:
           sdk: ${{ matrix.sdk }}
       - id: install