Update nuwcdivnpt/stig-manager Docker tag to v1.4.8

This MR contains the following updates:

Package	Type	Update	Change
nuwcdivnpt/stig-manager		patch	1.4.7 -> 1.4.8
nuwcdivnpt/stig-manager	ironbank-docker	patch	1.4.7 -> 1.4.8
nuwcdivnpt/stig-manager	stage	patch	1.4.7 -> 1.4.8

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Release Notes

NUWCDIVNPT/stig-manager (nuwcdivnpt/stig-manager)

v1.4.8

Compare Source

Changes:

• (API) feat: Added resultEngine, user, statusUser columns to Detail metrics exports.
• (API) feat: Listen on STIGMAN_API_PORT on startup and respond with status while bootstrap process is running.
• (API) chore: Remove Dockerfile healthcheck
• (API) chore: Refactor controllers to use a set of common functions when checking a collection grant or invoking elevation
• (Docs) chore: Minor updates and clarifications

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