Fix broken link

Signed-off-by: James Taylor <jamest@uk.ibm.com>

src/markdown-pages/docs/manage-ecosystem/runs-prepare.md

@@ -3,7 +3,7 @@ path: "/docs/manage-ecosystem/ecosystem-cli-runs-prepare"
 title: "Selecting tests to run in an Ecosystem"
 ---
 
-If you have a group of tests that you want to run in batch, the simplest way to do this is by defining these tests inside a portfolio. You can create a portfolio of tests by using the `runs prepare` command. You can build the portfolio from single or multiple [test streams](https://galasa.dev/docs/writing-own-tests/test-streams).
+If you have a group of tests that you want to run in batch, the simplest way to do this is by defining these tests inside a portfolio. You can create a portfolio of tests by using the `runs prepare` command. You can build the portfolio from single or multiple [test streams](/docs/manage-ecosystem/test-streams).
 
 This portfolio of tests can then be run by using the [runs submit command](/docs/manage-ecosystem/ecosystem-cli-runs-submit). When you submit the tests to run, you need specify only the portfolio name on the command, rather than listing all of the classes.