app/matrix: matrix.hackerspace.pl: give psql more storage

We ran out of disk space on the old PVC. Made a new one, copied data
over, and this change points the postgres data mount to that new PVC.

Change-Id: Iea4e140680066a3335cc69caf9293093f90bb568

app/matrix/matrix.hackerspace.pl.jsonnet

@@ -28,6 +28,24 @@ matrix {
         },
     },
 
+    // Bump up storage to 200Gi from default 100Gi, use different name.  The
+    // new name corresponds to a manually migrated and sized-up PVC that
+    // contains data from the original waw3-postgres PVC.
+    postgres3+: {
+        volumeClaim+: {
+            metadata+: {
+                name: "waw3-postgres-2",
+            },
+            spec+: {
+                resources+: {
+                    requests+: {
+                        storage: "200Gi",
+                    },
+                },
+            },
+        },
+    },
+
     appservices: {
         "irc-freenode": irc.AppServiceIrc("freenode") {
             cfg+: {