fix: restore standard Apache 2.0 license text

[djm81]

Summary

• Restored canonical Apache 2.0 license body text — two non-standard edits were causing GitHub's licensee to fall below its ~95% similarity threshold, showing "Other" instead of "Apache License 2.0"
• Only the copyright line in the appendix remains customized (as the Apache template intends)

Changes

1. Line 38: (which shall not include Communications...) → (an example is provided in the Appendix below).
2. Lines 59-60: clearly marked → conspicuously marked, restored trailing period on "Not a Contribution."

Test plan

• Verify GitHub repo page shows "Apache License 2.0" after merge
• Verify gh api repos/nold-ai/specfact-cli/license returns "key": "apache-2.0"

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