ITU G.650 minor changes

[anermina]

• Separated an image into two sub-figures and changed cross-referencing in accordance to the new anchors.
• Added one missing space.
• Replaced false dashes (which were causing hash instead of dash generation in PDF) with regular ones.

[ronaldtse]

@CAMOBAP795 can you have a look here? The build is failing due to:

[relaton-iso] ("ISO 19136") fetching...
164
bundler: failed to load command: metanorma (/usr/local/bundle/bin/metanorma)
165
NoMethodError: undefined method `empty?' for nil:NilClass
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  /usr/local/bundle/gems/relaton-iso-0.11.0/lib/relaton_iso/hit_collection.rb:35:in `block in to_all_parts'
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  /usr/local/bundle/gems/relaton-iso-0.11.0/lib/relaton_iso/hit_collection.rb:35:in `select'
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  /usr/local/bundle/gems/relaton-iso-0.11.0/lib/relaton_iso/hit_collection.rb:35:in `to_all_parts'
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  /usr/local/bundle/gems/relaton-iso-0.11.0/lib/relaton_iso/iso_bibliography.rb:159:in `isobib_results_filter'
170

[ronaldtse]

(Thanks @anermina , the content is good!)

[CAMOBAP]

@anermina please ignore the issue on windows it will be fixed on next release metanorma/chocolatey-metanorma#42

I have restarted the workflows and builds looks good

[anermina]

Thanks @CAMOBAP795 ! I'll have that on my mind.