refactor(workflows): Update code scanning workflow (#101)

* fix(docs): enable globbing in "Upgrading from Version 1?" section

* PR comments

* refactor(workflows): Update code scanning workflow

* Update .github/workflows/codeql-analysis.yml

* Update .github/workflows/codeql-analysis.yml

* Apply suggestions from code review

* Update .github/workflows/codeql-analysis.yml

* Update .github/workflows/codeql-analysis.yml

* Remove comments

.github/workflows/codeql-analysis.yml

@@ -2,19 +2,17 @@ name: "CodeQL"
 
 on:
   push:
-    branches-ignore: dependabot/**
+  pull_request:
   schedule:
     - cron: '38 18 * * 3'
 
 jobs:
   analyze:
     name: Analyze
     runs-on: ubuntu-latest
-
     permissions:
-      actions: write
+      actions: read
       contents: read
-      pull-requests: read
       security-events: write
 
     strategy:
@@ -26,6 +24,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v2
 
+    # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
       with: