@Operation(parameters = {
			@Parameter(in = ParameterIn.HEADER, name = "test_header", required = true, schema = @Schema(type = "string", example = "rherherherherh")) })
	@GetMapping("/test2")
	public String test2(@RequestParam(name = "param1") String param1) {
		return "test";
	}
Test 2 string.

@param param1 the param 1
@return the string
springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v30/app51/HelloController.java