CHANGE: Bump version to 1.15.1

[Pauliusd01]

Description

Bumps version to a temporary 1.15.1 one.

Testing status & QA

CI only

Overall Product Risks

N/A

Comments to reviewers

N/A

Checklist

Before review:

• Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
  • For API change contains an example snippet and/or migration example.
  • JIRA ticket linked, example (case %%). If it is a private issue, just add the case ID without a link.
  • Jira port for the next release set as "Resolved".
• Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
  • Performance tests.
  • Integration tests.
• Docs for new/changed API's.
  • Xmldoc cross references are set correctly.
  • Added explanation how the API works.
  • Usage code examples added.
  • The manual is updated, if needed.

During merge:

• Commit message for squash-merge is prefixed with one of the list:
  • NEW: ___.
  • FIX: ___.
  • DOCS: ___.
  • CHANGE: ___.
  • RELEASE: 1.1.0-preview.3.

After merge:

• Create forward/backward port if needed. If you are blocked from creating a forward port now please add a task to ISX-1444.

[codecov-github-com]

Codecov Report

All modified and coverable lines are covered by tests ✅

@@           Coverage Diff            @@
##           develop    #2252   +/-   ##
========================================
  Coverage    76.70%   76.70%           
========================================
  Files          465      465           
  Lines        87919    87919           
========================================
  Hits         67442    67442           
  Misses       20477    20477           

Flag	Coverage Δ
inputsystem_MacOS_2021.3_project	78.05% <ø> (ø)
inputsystem_MacOS_6000.2_project	76.50% <ø> (ø)
inputsystem_MacOS_6000.3_project	76.50% <ø> (ø)

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

Files with missing lines	Coverage Δ
Assets/Samples/InGameHints/InGameHintsActions.cs	17.69% <ø> (ø)
...sts/InputSystem/InputActionCodeGeneratorActions.cs	59.49% <ø> (ø)
...em/InputSystem/Devices/Precompiled/FastKeyboard.cs	100.00% <ø> (ø)
...ystem/InputSystem/Devices/Precompiled/FastMouse.cs	100.00% <ø> (ø)
...InputSystem/Devices/Precompiled/FastTouchscreen.cs	100.00% <ø> (ø)

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