Update past_students.yaml with comments and job change

Comment out past student entries and update job title for Zachary Driskill.

Author: philipbl

_data/past_students.yaml

@@ -1,19 +1,19 @@
 graduate_students:
-  - first_name: Lehi
-    last_name: Alcantara
-    degree: MS
-    link: https://www.linkedin.com/in/lehi-alcantara/
-    image: /images/alcantara.jpg
-    graduation: 2021-04-01
-    job: Brigham Young University
-
-  - first_name: Ian
-    last_name: Schwallier
-    degree: MS
-    image: /images/schwallier.jpg
-    link: https://www.linkedin.com/in/ianschwallier/
-    graduation: 2022-04-01
-    job: L3Harris
+  # - first_name: Lehi
+  #   last_name: Alcantara
+  #   degree: MS
+  #   link: https://www.linkedin.com/in/lehi-alcantara/
+  #   image: /images/alcantara.jpg
+  #   graduation: 2021-04-01
+  #   job: Brigham Young University
+
+  # - first_name: Ian
+  #   last_name: Schwallier
+  #   degree: MS
+  #   image: /images/schwallier.jpg
+  #   link: https://www.linkedin.com/in/ianschwallier/
+  #   graduation: 2022-04-01
+  #   job: L3Harris
 
   - first_name: Daniel
     last_name: Sharp
@@ -77,7 +77,7 @@ graduate_students:
     image: /images/driskill.jpg
     link: https://www.linkedin.com/in/zachary-driskill/
     graduation: 2026-04-02
-    job: U.S. Department of War
+    job: U.S. Department of Defense
 
   - first_name: Brian
     last_name: Smith