website: Add specific workshop date to ISCA '23

This change also fixes some Markdown formatting.

Change-Id: I8187608491b5a05de065237336500ccba4f37bcf
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/68678
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
diff --git a/_pages/events/isca-2023.md b/_pages/events/isca-2023.md
index e824ee3..79d75ab 100644
--- a/_pages/events/isca-2023.md
+++ b/_pages/events/isca-2023.md
@@ -13,9 +13,10 @@
 
 ## Key Dates
 
-* Submission deadline:  *April 14th 2023 (AOE)**
+* Submission deadline:  **April 14th 2023 (AOE)**
 * Notification of acceptance and time-slot awarded: **May 1st 2023**
-* Workshop date: Exact day TBD; **June 17th to June 21th 2023**
+* ISCA dates: **June 17th to June 21th 2023**
+* Workshop date: **June 17th 2023**
 
 ## Call for Presentations
 
@@ -60,9 +61,10 @@
 
 **Key Dates**:
 
-Submission deadline:  *April 14th 2023 (AOE)**
-Notification of acceptance and time-slot awarded: **May 1st 2023**
-Workshop date: Exact day TBD; **June 17th to June 21th 2023**
+* Submission deadline:  **April 14th 2023 (AOE)**
+* Notification of acceptance and time-slot awarded: **May 1st 2023**
+* ISCA dates: **June 17th to June 21th 2023**
+* Workshop date: **June 17th 2023**
 
 We look forward to receiving your proposals and seeing you at the gem5 Workshop!