fix: Add rule for CryptoCrew (hyperlane-xyz#6176)

### Description

Add rule for CryptoCrew

### Backward compatibility

Yes

### Testing

Manual, locally

---------

Co-authored-by: Danil Nemirovsky <4614623+ameten@users.noreply.github.com>

Author: ameten

.gitleaks.toml

@@ -86,3 +86,13 @@ keywords = [
     "grove.city"
 ]
 tags = ["key", "Grove City"]
+
+[[rules]]
+id = "ccvalidators-api-key"
+description = "CryptoCrew API Key"
+regex = '''https://(rpc|grpc|rest)\.[a-zA-Z0-9-]+\.ccvalidators\.com:?[0-9]*/?[a-zA-Z0-9-]*'''
+keywords = [
+    "ccvalidators",
+    "ccvalidators.com"
+]
+tags = ["key", "Crypto Crew"]