Fix list formatting in README.md

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>

README.md

diff --git a/README.md b/README.md
index 68f04bb..2bb409d 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,6 @@
 "releases" of the skywater-pdk.
 
 This builder needs to run when;
- (a) The SkyWater PDK @ https://github.com/google/skywater-pdk repository is updated.
- (b) The `open_pdks` @ https://github.com/RTimothyEdwards/open_pdks repository is updated.
- (c) The Magic tool @ https://github.com/RTimothyEdwards/magic is updated.
+ * (a) The SkyWater PDK @ https://github.com/google/skywater-pdk repository is updated.
+ * (b) The `open_pdks` @ https://github.com/RTimothyEdwards/open_pdks repository is updated.
+ * (c) The Magic tool @ https://github.com/RTimothyEdwards/magic is updated.