Update techdocs.ts container image

Signed-off-by: John Philip <johnphilip283@gmail.com>

plugins/techdocs-node/src/stages/generate/techdocs.ts

@@ -53,7 +53,7 @@ export class TechdocsGenerator implements GeneratorBase {
    * The default docker image (and version) used to generate content. Public
    * and static so that techdocs-node consumers can use the same version.
    */
-  public static readonly defaultDockerImage = 'spotify/techdocs:v1.2.3';
+  public static readonly defaultDockerImage = 'spotify/techdocs:v1.2.4';
   private readonly logger: Logger;
   private readonly containerRunner?: ContainerRunner;
   private readonly options: GeneratorConfig;