chore: refresh actions and add Dependabot

- bump UpdatePWSHAction to v1.0.3 in CI and docs workflows
- use PSScriptAnalyzer action tag v1.21.0
- add Dependabot config for actions and pip dependencies

Author: cksapp

.github/dependabot.yml

@@ -0,0 +1,35 @@
+version: 2
+updates:
+  # Monitor GitHub Actions for updates
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "06:00"
+    open-pull-requests-limit: 5
+    reviewers:
+      - "cksapp"
+    labels:
+      - "dependencies"
+      - "github-actions"
+    commit-message:
+      prefix: "ci"
+      include: "scope"
+
+  # Monitor Python dependencies in requirements.txt
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+      time: "06:00"
+    open-pull-requests-limit: 5
+    reviewers:
+      - "cksapp"
+    labels:
+      - "dependencies"
+      - "python"
+    commit-message:
+      prefix: "build"
+      include: "scope"

.github/workflows/Build_DocsSite.yml

@@ -41,7 +41,7 @@ jobs:
           path: .cache
 
       - name: Setup PowerShell
-        uses: bjompen/UpdatePWSHAction@v1.0.1
+        uses: bjompen/UpdatePWSHAction@v1.0.3
 
       - name: Build and deploy documentation
         if: github.ref == 'refs/heads/main'

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup PowerShell
-        uses: bjompen/UpdatePWSHAction@v1.0.1
+        uses: bjompen/UpdatePWSHAction@v1.0.3
 
       - name: Run Pester Tests
         shell: pwsh
@@ -57,7 +57,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Run PSScriptAnalyzer
-        uses: microsoft/psscriptanalyzer-action@6b2948b1944407914a58661c49941824d149734f
+        uses: microsoft/psscriptanalyzer-action@v1.21.0
         with:
           path: .\
           recurse: true