Fix inconsistent indentation in README code blocks

[Copilot]

Several code blocks in the Installation Steps section had inconsistent indentation that broke visual alignment and made examples harder to read.

Changes

• Fixed git clone command indentation in step 1 (line 50)
• Fixed environment variable indentation in .env example block (lines 71, 83-84)

All code blocks now use consistent 3-space indentation matching the numbered list structure.

Before:

# PostgreSQL Configuration (Recommended)
POSTGRES_URL=postgresql://titanbot:yourpassword@localhost:5432/titanbot
   POSTGRES_HOST=localhost

After:

# PostgreSQL Configuration (Recommended)
   POSTGRES_URL=postgresql://titanbot:yourpassword@localhost:5432/titanbot
   POSTGRES_HOST=localhost

Original prompt

I want to fix up README.md as something are not align or look good

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[codebymitch]

@copilot