Remove "go install" README instructions

[cretz]

What changed?

Changed install instructions to use releases instead of go install

Why?

Since #118, this is now displayed on go install:

go: github.com/temporalio/temporalite/cmd/temporalite@latest (in github.com/temporalio/temporalite@v0.2.0):
	The go.mod file for the module providing named packages contains one or
	more replace directives. It must not contain directives that would cause
	it to be interpreted differently than if it were the main module.

[codecov-commenter]

Codecov Report

Merging #145 (bf8f462) into main (f974733) will increase coverage by 0.20%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #145      +/-   ##
==========================================
+ Coverage   63.67%   63.88%   +0.20%     
==========================================
  Files          13       13              
  Lines         969      969              
==========================================
+ Hits          617      619       +2     
+ Misses        313      311       -2     
  Partials       39       39              

Impacted Files	Coverage Δ
temporaltest/logger.go	86.66% <0.00%> (+13.33%)	⬆️

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