docs: fix reference to dateTime tagger

[bnjmn]

Fix reference to dateTime tagger that errors out if followed exactly.

Description
While following the docs I tried using the datetime tagger as it is written and got an error. Tried editing it to dateTime and it worked. Thought I'd suggest this change to hopefully help others that may run into an issue with it in the future. Thanks!

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[codecov]

Codecov Report

Merging #8813 (b9738d5) into main (290280e) will decrease coverage by 6.54%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #8813      +/-   ##
==========================================
- Coverage   70.48%   63.94%   -6.54%     
==========================================
  Files         515      620     +105     
  Lines       23150    31455    +8305     
==========================================
+ Hits        16317    20114    +3797     
- Misses       5776     9835    +4059     
- Partials     1057     1506     +449     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/completion.go	13.04% <0.00%> (-1.25%)	⬇️
cmd/skaffold/app/cmd/config/list.go	65.21% <ø> (ø)
cmd/skaffold/app/cmd/config/set.go	88.72% <ø> (ø)
cmd/skaffold/app/cmd/config/util.go	54.28% <ø> (ø)
cmd/skaffold/app/cmd/credits.go	100.00% <ø> (ø)
cmd/skaffold/app/cmd/credits/export.go	0.00% <0.00%> (ø)
cmd/skaffold/app/cmd/deploy.go	40.90% <0.00%> (-12.94%)	⬇️
cmd/skaffold/app/cmd/generate_pipeline.go	60.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_modules.go	65.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	66.66% <ø> (ø)
... and 40 more

... and 409 files with indirect coverage changes

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[aaron-prindle]

Thanks @bnjmn! LGTM