Update RX901__UnqualifiedJoins.toml

Got the rule functioning but unsure of edge cases.

Author: Soliseum

Azure/Azure-Templatized-YML-Pipeline/flyway-11/templates/rules/RX901__UnqualifiedJoins.toml

@@ -1,4 +1,4 @@
 dialects = ["TEXT"]
-rules = ["(?i)(?<=^|\\s)FROM(\\s+[\\w\\.]+(\\s+\\w+\\s*)?,)+(\\s+[\\w\\.]+\\s+\\w+\\s*)(WHERE|JOIN)(?=$|\\s|;)"]
+rules = ["(?i)FROM\\s+[^,]*,\\s+(?=.*\\bWHERE\\b).*"]
 passOnRegexMatch = false
 description = "Unqualified Join statement"