bot: Bump graphiql from 3.7.2 to 3.8.1 in /playground #659

Job	Run time
Test acp job (go, source-hub)	16m 41s
Test acp job (http, source-hub)	17m 0s
Test acp job (cli, source-hub)	16m 49s
Test job (go, file, gql)	12m 56s
Test job (go, file, collection-named)	13m 13s
Test job (go, file, collection-save)	12m 39s
Test os job (macos-latest)	14m 32s
Test job (go, memory, gql)	12m 52s
Test job (go, memory, collection-named)	12m 45s
Test job (go, memory, collection-save)	12m 31s
Test view job	12m 33s
Test job (http, file, gql)	13m 22s
Test job (http, file, collection-named)	12m 55s
Test job (http, file, collection-save)	13m 43s
Test job (http, memory, gql)	13m 8s
Test job (http, memory, collection-named)	12m 36s
Test job (http, memory, collection-save)	13m 1s
Test job (cli, file, gql)	13m 39s
Test job (cli, file, collection-named)	13m 30s
Test job (cli, file, collection-save)	13m 39s
Test job (cli, memory, gql)	13m 31s
Test job (cli, memory, collection-named)	13m 29s
Test job (cli, memory, collection-save)	13m 41s
Test encryption job	12m 51s
Test lens job (wazero)	12m 20s
Test lens job (wasmer)	12m 21s
Upload test code coverage job	8s
	5h 52m 25s

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