Fix line breaks in README

Signed-off-by: Ravi Varadarajan <rvaradarajan@ucsd.edu>

Flows/NanGate45/ariane136/README.md

 We implement [Ariane design with 136 macros](../../../Testcases/ariane136/) on the [NanGate45](../../../Enablements/Nangate45) platform using the proprietary (commercial) tools **Cadence Genus** (Synthesis) and **Cadence Innovus** (P&R), and the open-source tools **Yosys** (Synthesis) and **OpenROAD** (P&R). 
 
-The screenshot of the design using Cadence Flow-1 on Nangate45 enablement is shown below
+The screenshot of the design using Cadence Flow-1 on Nangate45 enablement is shown below   
 <img src="./screenshots/Ariane136_Innovus_Genus.png" alt="ariane136_cadence" width="400"/>  
   
-The screenshot of the design using ORFS on Nangate45 enablement is shown below
+The screenshot of the design using ORFS on Nangate45 enablement is shown below  
 <img src="./screenshots/Ariane136_ORFS_SPNR.png" alt="ariane136_orfs" width="400"/>