Update budget recommendation text

[kt-12]

Changes proposed in this Pull Request:

Closes #2600 .

Text updated to reflect the change. Check screenshot.

Screenshots:

Multiple Counties selected

Single country selected

Detailed test instructions:

1. On "Create your paid campaign" page select single country
2. Check if the text change is reflected.
3. Now select an additional country and see if the text is same as shown in the screenshot above.

Additional details:

Changelog entry

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.7%. Comparing base (1c6a902) to head (b1f9944).
Report is 15 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##             develop   #2629      +/-   ##
============================================
- Coverage       65.3%   62.7%    -2.6%     
============================================
  Files            474     319     -155     
  Lines          17893    5074   -12819     
  Branches           0    1231    +1231     
============================================
- Hits           11685    3180    -8505     
+ Misses          6208    1721    -4487     
- Partials           0     173     +173     

Flag	Coverage Δ
js-unit-tests	62.7% <ø> (?)
php-unit-tests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...-ads/budget-section/budget-recommendation/index.js	4.0% <ø> (ø)

... and 792 files with indirect coverage changes

[asvinb]

LGTM @kt-12

[ankitguptaindia]

Changes Look good and working as expected. ✅

Recording.883.mp4