Add note about Danger matching rules (#1756)

Task/Issue URL:
https://app.asana.com/0/1200194497630846/1205584545360104/f
Tech Design URL:
CC:

**Description**:
Add note about a Danger rule that checks Privacy and TDS files URL
matching.

**Steps to test this PR**:
1. Check CI is green.

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DuckDuckGo/AppDelegate/AppConfigurationURLProvider.swift

@@ -22,6 +22,8 @@ import Configuration
 struct AppConfigurationURLProvider: ConfigurationURLProviding {
 
     func url(for configuration: Configuration) -> URL {
+        // URLs for privacyConfiguration and trackerDataSet shall match the ones in update_embedded.sh. 
+        // Danger checks that the URLs match on every PR. If the code changes, the regex that Danger uses may need an update.
         switch configuration {
         case .bloomFilterBinary: return URL(string: "https://staticcdn.duckduckgo.com/https/https-mobile-v2-bloom.bin")!
         case .bloomFilterSpec: return URL(string: "https://staticcdn.duckduckgo.com/https/https-mobile-v2-bloom-spec.json")!

scripts/update_embedded.sh

@@ -2,6 +2,8 @@
 
 set -eo pipefail
 
+# The following URLs shall match the ones in AppConfigurationURLprovider.swift. 
+# Danger checks that the URLs match on every PR. If the code changes, the regex that Danger uses may need an update.
 TDS_URL="https://staticcdn.duckduckgo.com/trackerblocking/v5/current/macos-tds.json"
 CONFIG_URL="https://staticcdn.duckduckgo.com/trackerblocking/config/v3/macos-config.json"