fix(flow): fix invalid ellipseText regex

This invalid regex was causing Mermaid to freeze.

packages/mermaid/src/diagrams/flowchart/parser/flow-text.spec.js

@@ -535,6 +535,10 @@ describe('[Text] when parsing', () => {
     expect(vert['A'].text).toBe('this is an ellipse');
   });
 
+  it('should not freeze when ellipse text has a `(`', function () {
+    expect(() => flow.parser.parse('graph\nX(- My Text (')).toThrowError();
+  });
+
   it('should handle text in diamond vertices with space', function () {
     const res = flow.parser.parse('graph TD;A(chimpansen hoppar)-->C;');
 

packages/mermaid/src/diagrams/flowchart/parser/flow.jison

@@ -134,7 +134,7 @@ that id.
 <*>\s*\~\~[\~]+\s*              return 'LINK';
 
 <ellipseText>[-/\)][\)]         { this.popState(); return '-)'; }
-<ellipseText>[^\(\)\[\]\{\}]|-/!\)+       return "TEXT"
+<ellipseText>[^\(\)\[\]\{\}]|-\!\)+       return "TEXT"
 <*>"(-"                         { this.pushState("ellipseText"); return '(-'; }
 
 <text>"])"                { this.popState(); return 'STADIUMEND'; }