DOC add `sonar.buildString` to params list

server/sonar-docs/src/pages/analysis/analysis-parameters.md

@@ -72,6 +72,7 @@ Key | Description | Default
 `sonar.scm.forceReloadAll` | By default, blame information is only retrieved for changed files. Set this property to `true` to load blame information for all files. This can be useful is you feel that some SCM data is outdated but {instance} does not get the latest information from the SCM engine. | 
 `sonar.scm.exclusions.disabled`| For supported engines, files ignored by the SCM, i.e. files listed in `.gitignore`, will automatically be ignored by analysis too. Set this property to `true` to disable that feature.|
 `sonar.analysis.[yourKey]`| This property stub allows you to insert custom key/value pairs into the analysis context, which will also be passed forward to [webhooks](/project-administration/webhooks/). | |
+`sonar.buildString`| The string passed with this property will be stored with the analysis and available in the results of `api/project_analyses/search`, thus allowing you to later identify a specific analysis and obtain its ID for use with `api/project_analyses/set_baseline`. | |
 
 
 ### Duplications