Fix formatting in wiki/provider_injection.md

[mogottsch]

I added a missing whitespace.

[codecov-commenter]

Codecov Report

Merging #1449 (650ce28) into master (922a09c) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1449      +/-   ##
==========================================
+ Coverage   99.85%   99.87%   +0.01%     
==========================================
  Files          53       53              
  Lines        1367     1570     +203     
  Branches      192      201       +9     
==========================================
+ Hits         1365     1568     +203     
  Partials        2        2              

Impacted Files	Coverage Δ
src/scope/scope.ts	96.55% <0.00%> (-0.12%)	⬇️
src/planning/plan.ts	100.00% <0.00%> (ø)
src/planning/target.ts	100.00% <0.00%> (ø)
src/bindings/binding.ts	100.00% <0.00%> (ø)
src/container/lookup.ts	100.00% <0.00%> (ø)
src/planning/context.ts	100.00% <0.00%> (ø)
src/planning/request.ts	100.00% <0.00%> (ø)
src/planning/metadata.ts	100.00% <0.00%> (ø)
src/container/container.ts	100.00% <0.00%> (ø)
src/resolution/resolver.ts	100.00% <0.00%> (ø)
... and 12 more

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