Fix mbtiles validate uppercase hash #1934

Job	Run time
Build x86_64-unknown-linux-gnu	21m 38s
Build x86_64-pc-windows-msvc	27m 16s
Build x86_64-apple-darwin	12m 4s
Build aarch64-apple-darwin	15m 20s
Test Legacy DB (postgis/postgis:11-3.0-alpine, postgres, disable)	11m 7s
Test & package x86_64-unknown-linux-gnu	8m 59s
Test Legacy DB (postgis/postgis:14-3.3-alpine, postgres, disable)	9m 7s
Test & package x86_64-pc-windows-msvc	54s
Test Legacy DB (postgis/postgis:15-3.3, postgres -c ssl=on -c ssl_cert_file=/etc/ssl/certs/ssl-ce...	8m 53s
Test & package x86_64-apple-darwin	4m 31s
Test & package aarch64-apple-darwin	10s
	1h 59m 59s

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