app/eth2wrap: fix metric namespace

[corverroos]

Fixes prometheus namespaces for eth2wrap metrics.

category: bug
ticket: #362

[codecov]

Codecov Report

Merging #377 (38c23b0) into main (4ec9732) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #377   +/-   ##
=======================================
  Coverage   55.74%   55.74%           
=======================================
  Files          62       62           
  Lines        5355     5355           
=======================================
  Hits         2985     2985           
- Misses       1968     1969    +1     
+ Partials      402      401    -1     

Impacted Files	Coverage Δ
core/dutydb/memory.go	78.43% <0.00%> (-1.97%)	⬇️
app/app.go	65.07% <0.00%> (+0.95%)	⬆️

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