Ransomware quickstart - Remove "Congrats" message and change header

[ilija-lazoroski]

What does this PR do?

Fixes "Remove" task from #1241

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested by {Running the Monkey locally with relevant config/running Island/...}

• If applicable, add screenshots or log transcripts of the feature working

Explain Changes

Are the commit messages enough? If not, elaborate.

[codecov]

Codecov Report

Merging #1314 (a5151a6) into develop (af739b6) will increase coverage by 0.22%.
The diff coverage is n/a.

❗ Current head a5151a6 differs from pull request most recent head bf5ff8d. Consider uploading reports for the commit bf5ff8d to get more accurate results

@@             Coverage Diff             @@
##           develop    #1314      +/-   ##
===========================================
+ Coverage    30.87%   31.10%   +0.22%     
===========================================
  Files          454      458       +4     
  Lines        13545    13596      +51     
===========================================
+ Hits          4182     4229      +47     
- Misses        9363     9367       +4     

Impacted Files	Coverage Δ
...ey/monkey_island/cc/resources/ransomware_report.py	0.00% <0.00%> (ø)
...sts/mongo_documents/telemetries/file_encryption.py	100.00% <0.00%> (ø)
...island/cc/services/ransomware/ransomware_report.py	100.00% <0.00%> (ø)
...ey/tests/data_for_tests/mongo_documents/monkeys.py	100.00% <0.00%> (ø)
...nkey/tests/data_for_tests/mongo_documents/edges.py	100.00% <0.00%> (ø)
.../infection_monkey/ransomware/ransomware_payload.py	96.66% <0.00%> (+0.32%)	⬆️

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[VakarisZ]

Remove the bottom margin of the title and change "Get Started" to "Getting Started". Also, add 20px of space between buttons and next section in the page

[ilija-lazoroski]