JS: use shared YAML library

Author: aibaars

javascript/ql/lib/qlpack.yml

@@ -9,5 +9,6 @@ dependencies:
   codeql/regex: ${workspace}
   codeql/tutorial: ${workspace}
   codeql/util: ${workspace}
+  codeql/yaml: ${workspace}
 dataExtensions:
   - semmle/javascript/frameworks/**/model.yml

javascript/ql/lib/semmle/javascript/Actions.qll

@@ -32,7 +32,7 @@ module Actions {
     string getName() { result = this.lookup("name").(YamlString).getValue() }
 
     /** Gets the name of the workflow file. */
-    string getFileName() { result = this.getFile().getBaseName() }
+    string getFileName() { result = this.getLocation().getFile().getBaseName() }
 
     /** Gets the `on:` in this workflow. */
     On getOn() { result = this.lookup("on") }