Fixup refactoring of isRelativePath in PathExprResolver

Author: asgerf

javascript/ql/lib/semmle/javascript/internal/paths/PathExprResolver.qll

@@ -172,7 +172,7 @@ module ResolveExpr<exprSig/1 shouldResolveExpr> {
     or
     // Resolve from baseUrl of relevant tsconfig.json file
     path = expr.getValue() and
-    path.isRelativePath() and
+    not path.isRelativePath() and
     getAPathMappingFromPathExpr(expr).hasBaseUrl(base)
     or
     // If the path starts with the name of a package, but did not match any path mapping,