build(deps): bump Externals/imgui from `c807192` to `696a533`

Created by: dependabot[bot]

Bumps Externals/imgui from c807192 to 696a533.

Commits

• 696a533 TestEngine: added ImGuiItemStatusFlags_Inputable flag report to facilitate fu...
• 752603b Fixed imgui_single_file.h for IMGUI_DEFINE_MATH_OPERATORS change. (#6164, #61...
• a1b8457 Moved the optional "courtesy maths operators" (#define IMGUI_DEFINE_MATH_OPER...
• 5d74891 Backends: Win32: Use WM_NCMOUSEMOVE / WM_NCMOUSELEAVE to track mouse position...
• 4f630b0 imgui_freetype: fixed non-ASCII characters in sources. (#6166)
• 204cb4d Version 1.89.4 WIP
• 458a109 Version 1.89.3
• b0c1816 Backends: OpenGL3: Fixed loader compatibility with GL_VERSION for GL 2.x (#61...
• fa0852f ColorEdit, ColorPicker: Fixed hue/saturation preservation logic from interfer...
• 092b682 Fonts: Assert that in each GlyphRanges[] pairs first is <= second.
• Additional commits viewable in compare view

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