docs: avoid indention error in converted config

[kesselb]

Summary

Error when building the docs:

reading sources... [100%] configuration_server/config_sample_php_parameters
/home/daniel/Code/nextcloud-docs/admin_manual/configuration_server/config_sample_php_parameters.rst:3644: ERROR: Unexpected indentation. [docutils]
/home/daniel/Code/nextcloud-docs/admin_manual/configuration_server/config_sample_php_parameters.rst:3890: ERROR: Unexpected indentation. [docutils]

Caused by:

Allow creation of external storages of type "Local" via the web interface and
APIs. When disabled, local storages can still be created using the occ command::
  occ files_external:create /mountpoint local null::null -c datadir=/path/to/data

(c.f. https://github.com/nextcloud/documentation/blob/978e27d3a47239fff6d35157770461986f046fdf/admin_manual/configuration_server/config_sample_php_parameters.rst?plain=1#L3642-L3644)

I'd also think the command is nicer as a block and easier to copy, however is it's currently causing an issue and there are also of couple of other occ references in that file using the other syntax.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

[nickvergessen]

Okay, the actual problem is when there code block is at the start of the description (first line is considered summary of the description).

• So if that ends with colons we could readd the spaces: fix(code): Fix code blocks directly after summary nextcloud-config-converter#15
• Or we basically disallow code blocks

both is crying for problems at some point