fix(LEMS-2745): update terminology for angle graphs

[anakaren-rojas]

Summary:

Updates terminology for angle graph - changes Initial and Terminal to Starting and Ending

Issue: LEMS-2745

[github-actions]

Size Change: +36 B (0%)

Total Size: 1.27 MB

Filename	Size	Change
packages/perseus/dist/es/index.js	417 kB	+8 B (0%)
packages/perseus/dist/es/strings.js	4.95 kB	+28 B (+0.57%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	39 kB
packages/keypad-context/dist/es/index.js	760 B
packages/kmath/dist/es/index.js	4.27 kB
packages/math-input/dist/es/index.js	78 kB
packages/math-input/dist/es/strings.js	1.79 kB
packages/perseus-core/dist/es/index.js	1.48 kB
packages/perseus-editor/dist/es/index.js	688 kB
packages/perseus-linter/dist/es/index.js	22.2 kB
packages/pure-markdown/dist/es/index.js	3.67 kB
packages/simple-markdown/dist/es/index.js	12.5 kB

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[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (3c49925) and published it to npm. You
can install it using the tag PR2061.

Example:

yarn add @khanacademy/perseus@PR2061

If you are working in Khan Academy's webapp, you can run:

./dev/tools/bump_perseus_version.sh -t PR2061