Rename README.md to Lte.md - #1301

PR classified as community.

⚠️ Head commit is NOT signed by a trusted team member, so the full 3-approval requirement applies. (Head commit is signed by GitHub but is not a 2-parent merge (has 1 parent(s)); not eligible for the Update-branch credit.)

Tip: signing the head commit with a key listed in security/trusted-signing-keys.csv reduces the approval requirement by 1.

⚠️ Collaborator approvals: 0/3.

Needs 3 more collaborator approvals to merge.