BRE-609/workflow-changes (#266)

## 🎟️ Tracking
[BRE-609](https://bitwarden.atlassian.net/browse/BRE-609)

## 📔 Objective
update workflows to be compliant with pull_request_target workflow
linter rule ahead of changing rule log level to error

## ⏰ Reminders before review

- Contributor guidelines followed
- All formatters and local linters executed and passed
- Written new unit and / or integration tests where applicable
- Protected functional changes with optionality (feature flags)
- Used internationalization (i18n) for all UI strings
- CI builds passed
- Communicated to DevOps any deployment requirements
- Updated any necessary documentation (Confluence, contributing docs) or
informed the documentation
  team

## 🦮 Reviewer guidelines

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- 👍 (`:+1:`) or similar for great changes
- 📝 (`:memo:`) or ℹ️ (`:information_source:`) for notes or general info
- ❓ (`:question:`) for questions
- 🤔 (`:thinking:`) or 💭 (`:thought_balloon:`) for more open inquiry
that's not quite a confirmed
  issue and could potentially benefit from discussion
- 🎨 (`:art:`) for suggestions / improvements
- ❌ (`:x:`) or ⚠️ (`:warning:`) for more significant problems or
concerns needing attention
- 🌱 (`:seedling:`) or ♻️ (`:recycle:`) for future improvements or
indications of technical debt
- ⛏ (`:pick:`) for minor or nitpick changes


[BRE-609]:
https://bitwarden.atlassian.net/browse/BRE-609?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: aj-bw

.github/workflows/scan.yml

@@ -7,8 +7,14 @@ on:
       - "main"
       - "rc"
       - "hotfix-rc"
+  pull_request:
+    types: [opened, synchronize, reopened]
+    branches-ignore:
+      - main
   pull_request_target:
-    types: [opened, synchronize]
+    types: [opened, synchronize, reopened]
+    branches:
+      - "main"
 
 jobs:
   check-run: