chore: update katran submodule to 34fc0b7f

  Upstream commits since last release:
  97a87db4 Support port and protocol for CIDR VIPs
c34fdf81 Fix CQS signal modernize-use-using in fbcode/katran/lib
f87971f2 Add CIDR prefix VIP support in BPF datapath
786a3b66 Add egress decap support: DECAP_EGRESS flag + XDP_TX path
43346aab Add source IP:port matching for DSR encapsulation
22961e49 batch_167
494c9612 Fix typo whcih to which in comment at cia/prp/main.py line 1286...
00d7e5b0 At line 88, fix the typo thier to their in the... in base.py and...

Author: github-actions[bot]