Add migration notes for 0.18.1 to 1.0.0 update (#828) #1

Job	Run time
Server Conformance	1m 17s
Client Conformance (elicitation-sep1034-client-defaults)	1m 25s
Client Conformance (tools_call)	1m 24s
Client Conformance (initialize)	1m 10s
Client Conformance (sse-retry)	1m 10s
Auth Conformance (auth/scope-step-up)	1m 8s
Auth Conformance (auth/basic-cimd)	1m 11s
Auth Conformance (auth/scope-from-www-authenticate)	1m 27s
Auth Conformance (auth/metadata-var3)	1m 21s
Auth Conformance (auth/scope-retry-limit)	1m 29s
Auth Conformance (auth/metadata-default)	1m 11s
Auth Conformance (auth/metadata-var2)	1m 24s
Auth Conformance (auth/metadata-var1)	1m 8s
Auth Conformance (auth/pre-registration)	1m 9s
Auth Conformance (auth/scope-from-scopes-supported)	1m 19s
Auth Conformance (auth/scope-omitted-when-undefined)	1m 13s
Auth Conformance (auth/token-endpoint-auth-none)	1m 16s
Auth Conformance (auth/token-endpoint-auth-post)	1m 23s
Auth Conformance (auth/token-endpoint-auth-basic)	1m 7s
	24m 12s

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