Preserve existing media type value during response parsing

[vearutop]

No description provided.

[github-actions]

Lines Of Code

Language	Files	Lines	Code	Comments	Blanks	Complexity	Bytes
Go	21	3958 (-6)	2945 (-8)	214	799 (+2)	807	91K (-140B)
Go (test)	22	6381 (+178)	4875 (+160)	660	846 (+18)	61 (+2)	164.3K (+4.2K)

[github-actions]

Go API Changes

# summary
Inferred base version: v0.2.51
Suggested version: v0.2.52

[github-actions]

Unit Test Coverage

total: (statements) 46.0%
changed lines: (statements) 100.0%

Coverage of changed lines

File	Function	Coverage
Total		100.0%
openapi3/reflect.go		100.0%
openapi3/reflect.go:691	parseJSONResponse	100.0%
openapi31/reflect.go		100.0%
openapi31/reflect.go:642	parseJSONResponse	100.0%

Coverage diff with base branch

File	Function	Base Coverage	Current Coverage
Total		45.6%	46.0% (+0.4%)
openapi3/entities.go	WithContentItem	0.0%	100.0% (+100.0%)
openapi3/entities.go	WithValue	0.0%	100.0% (+100.0%)
openapi3/jsonschema.go	fromSchemaArray	25.0%	100.0% (+75.0%)
openapi3/reflect.go	parseJSONResponse	93.8%	94.4% (+0.6%)
openapi31/entities.go	WithContentItem	0.0%	100.0% (+100.0%)
openapi31/entities.go	WithValue	0.0%	100.0% (+100.0%)
openapi31/reflect.go	parseJSONResponse	86.7%	88.2% (+1.5%)