Update README.md (#11)

Author: aegilops

README.md

@@ -29,6 +29,7 @@ Then, set up this Action as a step in your Actions workflow, e.g. for a typical
 * `no_cache`: Do not use cached versions of the Spotbugs and FindSecBugs tools. Default: `false`
 * `path_prefix`: Add this path prefix to the start of file locations. Required: `false`
 * `base_path`: The base path to use for installing the tools. Default: `/home/runner/work/`
+* `ram`: The RAM to use in MB. Default: `768`
 
 ## Full sample workflow