chore(release): bump versionName to 1.3.0-rc.5

[psjostrom]

### Fixed

- Live BG no longer disappears when CamAPS FX shows "Attempting" mode. The previous build wrongly rejected every CamAPS notification carrying the "Attempting" status word, blanking out Strimma during routine pump connection issues even though the sensor was still delivering. Verified against the CamAPS FX user manual: numeric value displayed = current sensor reading; "---" = no current data (already handled by the parser).

Test plan

• ./gradlew testDebugUnitTest — full suite green
• ./gradlew detekt — clean
• ./gradlew lintDebug — clean
• Live regression reproduced on-device (fix: stop rejecting fresh CamAPS readings during pump-only Attempting #231): pump Bluetooth turned off → CamAPS goes into "Attempting" with continuously-changing CGM values (6,7 → 6,8 → 6,9). On rc.4 the values were rejected and Strimma stayed stuck on the pre-Attempting reading. rc.5 binary not yet flashed — verify post-merge:
  • Install rc.5 on Pixel 9 Pro
  • Repeat the pump-Bluetooth-off scenario; confirm Strimma keeps following CamAPS's BG in real time
  • Cover the sensor (forces a true sensor outage); confirm Strimma stops advancing readings and the stale-data alert fires after the configured window

Changes since v1.3.0-rc.4

• 577e9bf fix: stop rejecting fresh CamAPS readings during pump-only Attempting (fix: stop rejecting fresh CamAPS readings during pump-only Attempting #231)

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