chore: comment spelling fix in otelhttp semconv

[vordimous]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.0%. Comparing base (4f053f2) to head (01bfb3e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #6407   +/-   ##
=====================================
  Coverage   67.0%   67.0%           
=====================================
  Files        193     193           
  Lines      15660   15660           
=====================================
+ Hits       10494   10497    +3     
+ Misses      4876    4874    -2     
+ Partials     290     289    -1     

Files with missing lines	Coverage Δ
...entation/net/http/otelhttp/internal/semconv/env.go	90.4% <100.0%> (ø)

... and 1 file with indirect coverage changes

[pellared]

Merging as trivial change.

[pellared]

@vordimous, thanks for the PR.