fix: fortran example (#45)

* fix: fortran example

Signed-off-by: Henry Schreiner <[email protected]>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Signed-off-by: Henry Schreiner <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: henryiii

projects/pi-fortran/pi/pi.pyf

@@ -1,10 +1,10 @@
 !    -*- f90 -*-
 ! Note: the context of this file is case sensitive.
-pymodule pi
-interface
-subroutine estimate_pi(pi_estimated,num_trials) ! in pi/_pi.f
-    real*8 intent(out) :: pi_estimated
-    integer intent(in) :: num_trials
-end subroutine estimate_pi
-end interface
-end pymodule pi
+python module pi
+    interface
+        subroutine estimate_pi(pi_estimated,num_trials) ! in pi/_pi.f
+            real*8 intent(out) :: pi_estimated
+            integer intent(in) :: num_trials
+        end subroutine estimate_pi
+    end interface
+end python module pi