fix: use word boundaries

Author: truemiller

.gitleaks.toml

@@ -536,9 +536,10 @@ secretGroup = 4
 
 [allowlist]
 description = "allowlist"
+regexTarget = "match"
 regexes = [
-    '''^0x[a-fA-F0-9]{40}$''',  # ignore evm public keys
-    '''219-09-9999''',          # global allow lists
+    '''\b(0x)?[0-9a-fA-F]{40}\b''', # ignore evm public keys
+    '''219-09-9999''', # global allow lists
     '''078-05-1120''',
     '''(9[0-9]{2}|666)-\d{2}-\d{4}'''
 ]