environment.yml: Pin surelog

Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>

environment.yml

diff --git a/environment.yml b/environment.yml
index a4cf46c..dc51454 100644
--- a/environment.yml
+++ b/environment.yml
@@ -20,5 +20,5 @@
   - litex-hub
 dependencies:
   - litex-hub::yosys=0.17_7_g990c9b8e1=20220512_085338_py37
-  - litex-hub::surelog
+  - litex-hub::surelog=0.0_5519_g900fb2499=20221223_060448_py37
   - litex-hub::iverilog