[Submodule]: Update submodule for sonic-telemetry (#10667)

Why I did it
Update sonic-telemetry submodules (to fix CVE-2021-3121 alert).

e56e9b4 Fix CVE-2021-3121 warning (#96)
bf1be4f [ci]: Support code diff coverage threshold 50% (#94)
64e516c Ported Marvell armhf build on x86 for debian buster to use cross-compilation instead of qemu emulation (#80)
e426388 [ci]: Support azp code coverage (#87)
0443e66 Remove DB Directory removal as part of make clean (#84)
085f29d Fix unhandled nil err check to prevent rpc causing a crash (#78)