Updating link to docs and massaging some text.

[egilmorez]

The URL to functions/get-started needed to be updated. Also tweaked some text to line up with docs.

[codecov-commenter]

Codecov Report

Base: 56.25% // Head: 56.28% // Increases project coverage by +0.03% :tada:

Coverage data is based on head (356e18f) compared to base (98e23ed). Patch coverage: 12.50% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5131      +/-   ##
==========================================
+ Coverage   56.25%   56.28%   +0.03%     
==========================================
  Files         308      309       +1     
  Lines       20814    20810       -4     
  Branches     4225     4222       -3     
==========================================
+ Hits        11708    11712       +4     
+ Misses       8094     8086       -8     
  Partials     1012     1012              

Impacted Files	Coverage Δ
src/emulator/functionsEmulator.ts	7.12% <0.00%> (-0.02%)	:arrow_down:
src/emulator/storage/apis/shared.ts	9.67% <9.67%> (ø)
src/emulator/storage/apis/firebase.ts	4.51% <25.00%> (+0.25%)	:arrow_up:
src/emulator/storage/apis/gcloud.ts	5.44% <50.00%> (+0.04%)	:arrow_up:
src/emulator/auth/state.ts	85.43% <0.00%> (+0.56%)	:arrow_up:

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