General comments to improve in page Current employment

[orchid00]

Reference: https://steve-crouch.github.io/international-survey-2022/section/current-employment/

• check all table headings to start with an Upper case letter. For example "in which field for"
• check all Figure titles to start with an Upper case letter. For example "in which field for"
• check all the second X axis to not overlap
• Length of current position, add "in years"
• Duration of contract in year > add "s" to years
• Salary > "Annual Salary"
• Check Type of funding figures, has text overlapping
• Official job titles should be group, case insensitive
• different job title, change “Is your role title RSE?”, yes/ no figure
• different job title add percentages to each bar