Add configuration for 2026.2/"H" elections

This is the result of the execution from "setup-election-config"
command on the repo assuming release date as 2026-04-01 from
release team and setting voting weeks as 3.

Paste log:
https://paste.opendev.org/show/brsNEzSADNkQSYGdDejo/

Change-Id: I80f637c49d4e065fb2dff071daf1d651328226f1
Signed-off-by: Ian Y. Choi <ianyrchoi@gmail.com>

configuration.yaml

@@ -1,26 +1,26 @@
 ---
-release: 2026.1
+release: 2026.2
 election_type: combined
-tag: 0.19.0
-tc_seats: 4
+tag: to-be-released
+tc_seats: 5
 timeframe:
-  name: 2025.1-2025.2
-  start: 2024-09-13T00:00
-  end: 2025-08-20T00:00
-  email_deadline: 2025-08-20T00:00
+  name: 2025.2-2026.1
+  start: 2025-03-14T00:00
+  end: 2026-02-18T00:00
+  email_deadline: 2026-02-18T00:00
 timeline:
   - name: TC Nominations
-    start: 2025-08-06T23:45
-    end: 2025-08-20T23:45
+    start: 2026-02-04T23:45
+    end: 2026-02-18T23:45
   - name: PTL Nominations
-    start: 2025-08-06T23:45
-    end: 2025-08-20T23:45
+    start: 2026-02-04T23:45
+    end: 2026-02-18T23:45
   - name: TC Campaigning
-    start: 2025-08-20T23:45
-    end: 2025-08-27T23:45
+    start: 2026-02-18T23:45
+    end: 2026-02-25T23:45
   - name: TC Election
-    start: 2025-08-27T23:45
-    end: 2025-09-17T23:45
+    start: 2026-02-25T23:45
+    end: 2026-03-18T23:45
   - name: PTL Election
-    start: 2025-08-27T23:45
-    end: 2025-09-17T23:45
+    start: 2026-02-25T23:45
+    end: 2026-03-18T23:45