Added envvars table needs an update due to newly added envvars

[mmattel]

Refernces:
#9267 (feat: add exif panel options to web config struct)
#10572 (limit the number of workers of the jsoncs3 share manager)

Both contain a new envvar that is currently not part of the added table but must be present for 7.0.0

#9267 will most likely be merged
#10572 was merged

IMPORTANT:
#10572 in my understanding, it misses the global envvar OCIS_MAX_CONCURRENCY and the text should be harmonized as we have in all max_concurrency envvars to: Maximum number of concurrent go-routines. Higher values can potentially get work done faster but will also cause more load on the system. Values of 0 or below will be ignored and the default value will be used.

When all set, I create a PR with the env_vars.yaml update and when merged another one containing the added table update.

@butonic @micbar

[mmattel]

Note, #9267 has not been merged, it got closed.