Updating example poll's expiration date

Author: eshon

polls/FIP-70: Enable DataCap Top up for Filecoin Plus Client Addresses.md

@@ -1,5 +1,5 @@
 **Background**
-This poll is to gather the community's sentiment on [FIP-70](https://github.com/filecoin-project/FIPs/issues/70). Discussions about this FIP can be carried out in the original FIP repo issue.
+This *sample* poll is to gather the community's sentiment on [FIP-70](https://github.com/filecoin-project/FIPs/issues/70). Discussions about this FIP can be carried out in the original FIP repo issue.
 
 **Proposal**
 Client addresses should be able to receive additional DataCap allocations to a given address.
@@ -11,7 +11,7 @@ Options:
 
 ---
 start: 2021-02-15 19:10
-end: 2021-02-29 00:00
+end: 2021-03-29 00:00
 constituents: [ all ]
 author: @jnthnvctr
 discussion: https://github.com/filecoin-project/FIPs/issues/70