Fixing location of "in," keyword for 08_phong

Would provide the error upon shader compilation:
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ERROR: GL shader index 1 did not compile
shader info log for GL index 1:
0:3(43): error: global variable cannot be given an explicit location in vertex s
hader
0:4(41): error: global variable cannot be given an explicit location in vertex s
hader
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For the vertex shader.  Moving the "in," keyword fixes this issue.