Revert "ci: disable QEMUv8_check_rust job"

This reverts commit 450963c289fe ("ci: disable QEMUv8_check_rust job").
The optee_rust project has been updated in [1] and the Rust tests are
now successful, therefore CI can be re-enabled.

Link: [1] https://github.com/OP-TEE/manifest/commit/beb79c27be83f7a4b90a898552569eb1a7638df8
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 81950f8..94acb1d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -352,7 +352,6 @@
 
   QEMUv8_check_rust:
     name: make check-rust (QEMUv8)
-    if: false # disabled until https://github.com/OP-TEE/optee_os/pull/5688#issuecomment-1370608865 is addressed
     runs-on: ubuntu-latest
     container: jforissier/optee_os_ci:qemuv8_check2
     steps: