overlord/snapstate: fix auto-refresh summary for 2 snaps

[pedronis]

No description provided.

[codecov-io]

Codecov Report

Merging #4388 into master will increase coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #4388      +/-   ##
==========================================
+ Coverage   78.03%   78.04%   +<.01%     
==========================================
  Files         450      450              
  Lines       30905    30904       -1     
==========================================
+ Hits        24116    24118       +2     
+ Misses       4776     4774       -2     
+ Partials     2013     2012       -1

Impacted Files	Coverage Δ
overlord/auth/auth.go	73.56% <ø> (ø)	⬆️
overlord/snapstate/autorefresh.go	79.31% <0%> (+0.67%)	⬆️
overlord/hookstate/hookmgr.go	72.83% <0%> (+1.15%)	⬆️

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