Tweak Issue Formatting

[tomrittervg]

Almost got it, just a slight fix:

- > No tests were found for flavor 'plain' and the following manifest filters:
  > skip_if, run_if, fail_if, subsuite(name=None), tags(['condprof']), pathprefix(['toolkit/components/pdfjs/test'])
  > 
  > Make sure the test paths (if any) are spelt correctly and the corresponding
  > --flavor and --subsuite are being used. See `mach mochitest --help` for a
  > list of valid flavors.
  - 2 of 2 failed on different tasks
		- test-linux1804-64-qr/opt-mochitest-plain-condprof-1 (SWkTFbstSI6YUFaDEehDOg)
		- test-windows10-64-2004-qr/opt-mochitest-plain-condprof-1 (HrQcOLpzSIK-n7XL0xE1hw)

Need to indent that first bullet.