Bump canvas-rce version to 5.3.0
Bump canvas-rce version to 5.3.0

flag=none
test plan
- jenkins passes

Change-Id: I8c6fa144ba5bef0e91f4541cce0e3d60a6b5437c
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/281953
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Joe Hernandez <2475ff9f2214a383ad29b079daec0de5f5df5945@instructure.com>
Reviewed-by: Jacob DeWar <185eb844d707bf97b714ed89a7539a3325c4b423@instructure.com>
QA-Review: Joe Hernandez <2475ff9f2214a383ad29b079daec0de5f5df5945@instructure.com>
Product-Review: Jon Scheiding <9af6aa5061dd5eef0e85122953253a66930fcf3e@instructure.com>

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